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Discussion Starter · #1 · (Edited)
Purpose of the thread:
Document all King Seiko model codes for easier reference / online searching

Contribute:
Please post suggestions to improve the details, changes, and new codes in the comments, so I can update the main thread

Automatic:
5245-6000 (date/special)
5245-6010 (date/special)
5246-5000 (day/date/oval/unique)
5246-5000 (day/date/special)
5246-6000 (day/date/special)
5246-6020 (day/date)
5246-6060 (day/date/chrono)
5256-8000 (day/date/special)
5256-8010 (day/date/special)
5621-5000 (no date/pocket!)
5621-6000 (no date/egg)
5621-7000 (no date)
5621-7000 (no date/roman)
5621-7020 (no date)
5621-7021 (no date)
5621-7022 (no date + special version)
5625's:
5625-5040 (date/square/unique)
5625-7000 (date/square/unique)
5625-7000 (date)
5625-7010 (date/big/unique)
5625-7030 (date/chrono)
5625-7040 (date/chrono)
5625-7041 (date/chrono)
5625-7060 (date/chrono)
5625-7070 (date)
5625-7080 (date)
5625-7110 (date)
5625-7111 (date/graduation)
5625-7113 (date)
5625-7120 (date)
5625-7121 (date)
5625-7122 (date)
5625-7160 (date)
5625-7170 (date/oval/unique)
5625-8000 (day/date)
5625-8001 (date)
5626's:
5626-5010 (day/date/tv)
5626-5040 (day/date/tv)
5626-5060 (day/date/tv)
5626-6000 (day/date/oval/unique)
5626-6020 (day/date/egg/unique)
5626-7000 (day/date)
5626-7010 (day/date/big/unique)
5626-7030 (day/date)
5626-7040 (day/date/chrono)
5626-7041 (day/date/chrono)
5626-7060 (day/date/chrono)
5626-7070 (day/date)
5626-7110 (day/date)
5626-7111 (day/date)
5626-7113 (day/date)
5626-7120 (day/date)
5626-7130 (day/date/graduation)
5626-7170 (day/date/oval)
5626-8000 (day/date)
5626-8001 (day/date)
5626-8010 (day/date)
5626-8011 (day/date)

Vanac:
5246-6030 (green/unique)
5246-6040 (dark)
5256-5010 (unique)
5626-5040 (day/date/tv)
5626-7140 (blue or yellow)
5626-7150 (blue)
5626-7160 (green)
5626-7190 (green)
5626-7230 (green)
5626-7250 (purple or green)
5626-723B (honeycomb)
5626-726A (alien)

Handwind:
45-7000 (no date)
45-7001 (no date)
45-7010 (no date)
45-8000 (no date/superior)
45-8010 (no date/superior)
4502-7000 (date)
4502-7001 (date)
4502-7010 (date)
4502-7020 (date)
4502-8000 (date/superior)
4502-8010 (date/superior)

Handwind (Old): (Ones that have "King Seiko" written on the dial)
J14102
44999
44-2000
44-9990
4402-8000
4420-9990
4420-9990

Notes:
eBay has a really messed up search algorithm, I search for "King Seiko" - If I don't use a VPN, nothing comes up, when I set my VPN to US, some international sellers come up, however, not all the watches come up, there are so so many $200-$300 range decent King Seiko's that are available to be bought directly, however, for some reason, some auctions shoot upwards of $500, even though the watches aren't even in original condition, I think this is because many buyers are not aware of all the watches
Edit: Turns out if you search "King Seiko" with a vpn and incognito, you can see all the listings, my eyes bled going through 1000's of them, completed my work on the list, seems enough coverage
Uber Pro Tip: As vsh pointed out, best to purchase these directly from Japanese domestic market with zenmarket.jp - I won a 5626-7010 thanks to his suggestion

Personal:
I personally want to collect King Seiko's, my initials are K.S. too, I started compiling this list as it's really hard to find one to buy, I originally wanted a handwind/no date, but I kinda like most of the unique ones too

Informative threads/replies:
- huangcjz on old handwinds and properties of some watches: https://www.watchuseek.com/f21/reference-list-king-seiko-model-codes-5131879.html#post51055429 (His imgur images don't show up, use the browser developer tool to inspect his reply, manually open each imgur url to see the photos ...)
 

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Discussion Starter · #5 ·
Thanks Bobo383, that's a great looking watch

Added your code to the list too, I missed the 5256 prefix altogether beforehand
 

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I'm finding it a bit hard to read your list to see what's missing because it's closely-spaced, but here are some but not all of the ones that you're missing:

5626-8000 - why do you have "mistake" next to the 5625-8000? Is it because of the dual-stamped code? Because that's not a mistake, it's a known thing that Seiko did to save costs at the end of the King Seiko production run, to not have to produce separate case-backs for the 5625-8000 and 5626-8000:

https://wristsushi.proboards.com/thread/20549/double-stamp-calibre-ref

The 5625/6-8000/1/10/11 have un-signed crowns (they are plain, and do not have the raised "KS" logo on them). This was again done by Seiko at the end of the King Seiko production run to save costs, and is the main difference (along with the dual-stamped case-back) between the 5625/6-7113 and the 5625/6-8000/1.

5626-7121 - this is a screw-on case-back version of the monobloc/one-piece-case 5626-7120. Again, Seiko switched from monobloc/one-piece-cases to screw-back cases later on in the King Seiko production run to save on costs. You are also missing the 5625-7120, 5625-7121, and 5625-7122. I don't know what the difference between the 5625-7121 and 5625-7122 is, though, and there doesn't seem to be a corresponding 5626-7122 model that I can find photos of.

5626-7041 - this is a screw-on case-back version of the monobloc/one-piece-case 5626-7040, just as with the 5625-7040 vs. the 5625-7041.

You are missing all of the pre-45KS hand-wind King Seikos:

J14102E / J14102 - photo - there are other dial variants of this watch. This example has a worn-down, possibly/probably incorrect crown - I think it should have coarse knurling like the crown on the gold-filled version of the 15034 below, and the crown might be too large, and there's an extra stainless-steel washer in between the crown and the case which shouldn't be there - and a patinated/toned dial:


15034, stainless steel model - there are other dial variants of this watch. My example has an incorrect hand-set and crown (should be the same hand-set as the gold-filled version of the 15034 below, but in stainless steel), and some dial damage:




15034, early 100 micron gold-filled version, photo - there are other dial variants of this watch. My example has some dial damage. I think the crown might be original - I'm not 100% sure:


442000 (1963.10 to 1964) - photo, but note that my example has some dial damage. It also has a worn-down, possibly original crown, but it's hard to tell because it's so worn-down:


44-2000 (this could technically be seen as a separate model to the 442000, since Seiko revised their model numbers to include a dash in them, but is otherwise the same watch as the 442000) (1965 to mid 1968) - photo, but note that my example has an incorrect, non-original, larger crown:


Note that it's not just a dial difference - the dial only changed from "DIASHOCK 25 JEWELS" to "25 JEWELS" with the Daini logo underneath in August 1967, so you will find 44-2000s with both the earlier and later dial types, but 442000s should only have the earlier dial type. If you look very carefully at the dial code in my photos, you might just be able to make out that there's a larger space and a dash in the dial code of the 44-2000 below, compared to the dial code in the 442000 above.

As you can see, the 442000 and 44-2000 share the same case as the gold-filled version of the 15034, but have a different dial and movement - the 44KS versions, 442000 and 44-2000, have stop-seconds (hacking) functions, whereas the 15034 has an earlier movement which does not have this function.

44999

44-9990 (this is the later model number version of the 44999, but is otherwise the same watch) - photo, this is the early dial variant (there were the same two type of dial text variant as with the 44-2000 above), and has the correct original crown. It also has some dial damage, but I've positioned the hands to hide it in the first photo!:










The blue you see is remnants of its original case-back sticker.

The dates in the photo below are not quite accurate - the dial design changed to the second variant around April 1967:



There are 2 other later case-back variants besides the earliest one shown above. The first type of medallion (King Seiko with shield) was found until around December 1966. The second type of medallion, "SEIKO" only, was found from around December 1966 to March 1968, with a 1-2 month overlap with the first version. The third type of medallion, which added a Daini lightning bolt logo, was found from April 1968 onwards. Again, the dates in the photo below are not quite accurate:



4402-8000 (King Seiko Calendar - has date) - photo, my example is in nice shape with all the original case-lines and original crown:




There are other case-back variants besides the earliest one shown above.

49999

4420-9990 (this is the later model number version of the 49999, but is otherwise the same watch, apart from a difference in the printing on the dial) - photo, this example has its original case lines, but an incorrect crown, which I think looks like a 52KS one rather than the correct one for this model, which I believe should look like the crown for the 44-9990 above:




Photos of my other examples:

4502-7000 - note that my example has a dial that has patinated/toned to a brownish/champagne shade, whereas it should be silver, but the case is in nice shape and the case-lines are very sharp, and it has its original crown:




4502-7010 - this has a linen dial, though it's hard to make out in my photo, and the case is in good shape with its original lines and brushed texture, and its original crown:




5626-7111 - my example is in nice shape, with its original shape case-lines and crown, and retains its original brushing on the thin angled lines on the lugs closest to the strap, which you might just be able to make out in the photo, though it's difficult, which is another distinguishing feature from the 5625/6-7000, apart from its narrower, pointier lugs:




5626-7041 - my example retains all its original sharp case-lines and finishing and crown:




5626-7121 - this has a vertical-lines-brushed textured dial, though it's difficult to see in my photo, and has its original crown. Note that the bracelet shown is not original to this model:




5626-5030 - this also has the same vertical-lines-brushed textured dial as the 5626-7121 above, though it's difficult to see in my photo. This watch has a screw-on case-back. There are earlier versions of this watch with the gold medallion like the early version of the 5625/6-7110, and later versions without the medallion and with a stamped KS instead, like the 5625/6-7111. My example has its original crown, and also some dial damage at the bottom of the dial, which seems to be not uncommon on this model:




5256-8010, with its original crown - though my example is not as nice as the one above:




Perhaps it might help to split up the 5621s from the 5625s from the 5626s from the 5245s from the 5246s from the 5256s to make each section of the list a bit shorter as easier to read?

I think it would also help if you made your explanatory notes a bit clearer/longer to more explicitly distinguish what the differences between the models are - for example, I don't know what you mean by "graduation" on the 5625-7111, and why it's not also on the 5626-7111. What do you mean by "big" and "unique"? What does "+ special version" mean on the 5621-7022?

I would also search Google Images for references for what models there are out there, not just eBay.
 

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Discussion Starter · #7 ·
Thanks @huangcjz - however for some reason your Imgur images don't load up, I inspected your reply, the images are there, they are just hidden - I updated the main thread after your reply, I personally don't have the capacity to categorise them that deeply, best to scatter that information in the thread as people comment later on - My purpose is to just compile a list, that a potential purchaser, or collector, or just an interested party can use to quickly google each model, one by one, going through the list

@vsh - Thanks a lot for that pro tip, I won a 5626-7010 thanks to you, I don't even like big watches (specifically panerai-like ones), yet the unique symmetrical dial design was just mesmerizing
 

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Discussion Starter · #8 ·
This seems like a holy grail, just stumbled onto it: A King Seiko elfeledett története
This includes a short summary for auto's: https://vintageseiko.nl/store/product/king-seiko-5626-7110-sold

I can no longer edit the main thread, but scratching the surface of Seiko's for some weeks, older seems almost always better

Example: This hobbywatchmaker has a lot of very useful divings: https://adventuresinamateurwatchfettling.com/2018/04/18/a-king-seiko-5626-7111/ - It's easy to observe how 5626A was more robust than 5626B - Like mentioned earlier, case design changed too, just from the pictures, I found the original version to be more "grand"

I concluded my initial spree by purchasing a sunburst 5626-7111 (before the knowledge, but no regrets) and a 45-7001 - the 45-7001 had a beautifully stained dial, I'm very excited to see it in person - the staining has a dark brown shade, it's uniform, one would assume a stained dial would go for cheaper, but it actually ended up costing more than average :)

For those who want a display caseback, this is the source: https://zenmarket.jp/en/yahoo.aspx?sellerID=toshizxsder - The 45KS one was auctioning for ~$250 - I'd rather buy another watch, it's also nickel plated which I try to avoid, but the seller is a good person I assume, if the auto caseback was compatible with 7111, I'd buy one, he said one will be available soon - the auto casebacks aren't as high in demand

Another interesting observation, there are some dead stock watches being auctioned, an unused grey sunburst 5626-7040 got auctioned up to $850 - it had the original price tag, original buckle - I wondered if it would've been better that I stumble first onto that watch, and only buy that one, but from personal experience, I rather not hurt a pristine thing and instead buy a used one for cheaper and enjoy it - If I bought the dead stock one, I'd keep it as a collectible and not use it

I hope when people stumble onto this thread in the future, it can guide them into the right direction
 

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Discussion Starter · #9 ·
Let me drop a little tid-bit of information here, there's information online that the 45-8000, 4502-8000 cases etc. have 19mm lug width's, but all the 5625-7010 / 5626-7010 information I've stumbled on indicated a lug width of 18mm, in reality it has a lug width of 19mm too - it even accommodates a 20mm leather nato, looks good
 

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For the 5621-7022 what does it mean by + special version? I've been trying to find the difference between the 7021 And 7022 but I havent found anything online. Hope someone could help with that.

Sent from my GM1917 using Tapatalk
 

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Discussion Starter · #12 ·
While I was cataloging, I didn't have much knowledge of the watches, it was my initial attempt to understand, the 5621-7022 I came across had special written on the dial

My current logic is, the lower the number, it's either better or same - some have new/inferior case designs, plastic date component instead of metal etc.

This is a good reference: Antique Watch Bar: KING SEIKO HI-BEAT 5621-7021 KS102 (SOLD) - as you can see, even the 7021 has the new case design, and probably plastic date component (5621B = plastic?)
 

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I'm finding it a bit hard to read your list to see what's missing because it's closely-spaced, but here are some but not all of the ones that you're missing:

5626-8000 - why do you have "mistake" next to the 5625-8000? Is it because of the dual-stamped code? Because that's not a mistake, it's a known thing that Seiko did to save costs at the end of the King Seiko production run, to not have to produce separate case-backs for the 5625-8000 and 5626-8000:

Double Stamp of Calibre Ref | Wrist Sushi - A Japanese Watch Forum

The 5625/6-8000/1/10/11 have un-signed crowns (they are plain, and do not have the raised "KS" logo on them). This was again done by Seiko at the end of the King Seiko production run to save costs, and is the main difference (along with the dual-stamped case-back) between the 5625/6-7113 and the 5625/6-8000/1.

5626-7121 - this is a screw-on case-back version of the monobloc/one-piece-case 5626-7120. Again, Seiko switched from monobloc/one-piece-cases to screw-back cases later on in the King Seiko production run to save on costs. You are also missing the 5625-7120, 5625-7121, and 5625-7122. I don't know what the difference between the 5625-7121 and 5625-7122 is, though, and there doesn't seem to be a corresponding 5626-7122 model that I can find photos of.

5626-7041 - this is a screw-on case-back version of the monobloc/one-piece-case 5626-7040, just as with the 5625-7040 vs. the 5625-7041.

You are missing all of the pre-45KS hand-wind King Seikos:

J14102E / J14102 - photo - there are other dial variants of this watch. This example has a worn-down, possibly/probably incorrect crown - I think it should have coarse knurling like the crown on the gold-filled version of the 15034 below, and the crown might be too large, and there's an extra stainless-steel washer in between the crown and the case which shouldn't be there - and a patinated/toned dial:


15034, stainless steel model - there are other dial variants of this watch. My example has an incorrect hand-set and crown (should be the same hand-set as the gold-filled version of the 15034 below, but in stainless steel), and some dial damage:




15034, early 100 micron gold-filled version, photo - there are other dial variants of this watch. My example has some dial damage. I think the crown might be original - I'm not 100% sure:


442000 (1963.10 to 1964) - photo, but note that my example has some dial damage. It also has a worn-down, possibly original crown, but it's hard to tell because it's so worn-down:


44-2000 (this could technically be seen as a separate model to the 442000, since Seiko revised their model numbers to include a dash in them, but is otherwise the same watch as the 442000) (1965 to mid 1968) - photo, but note that my example has an incorrect, non-original, larger crown:


Note that it's not just a dial difference - the dial only changed from "DIASHOCK 25 JEWELS" to "25 JEWELS" with the Daini logo underneath in August 1967, so you will find 44-2000s with both the earlier and later dial types, but 442000s should only have the earlier dial type. If you look very carefully at the dial code in my photos, you might just be able to make out that there's a larger space and a dash in the dial code of the 44-2000 below, compared to the dial code in the 442000 above.

As you can see, the 442000 and 44-2000 share the same case as the gold-filled version of the 15034, but have a different dial and movement - the 44KS versions, 442000 and 44-2000, have stop-seconds (hacking) functions, whereas the 15034 has an earlier movement which does not have this function.

44999

44-9990 (this is the later model number version of the 44999, but is otherwise the same watch) - photo, this is the early dial variant (there were the same two type of dial text variant as with the 44-2000 above), and has the correct original crown. It also has some dial damage, but I've positioned the hands to hide it in the first photo!:










The blue you see is remnants of its original case-back sticker.

The dates in the photo below are not quite accurate - the dial design changed to the second variant around April 1967:



There are 2 other later case-back variants besides the earliest one shown above. The first type of medallion (King Seiko with shield) was found until around December 1966. The second type of medallion, "SEIKO" only, was found from around December 1966 to March 1968, with a 1-2 month overlap with the first version. The third type of medallion, which added a Daini lightning bolt logo, was found from April 1968 onwards. Again, the dates in the photo below are not quite accurate:



4402-8000 (King Seiko Calendar - has date) - photo, my example is in nice shape with all the original case-lines and original crown:




There are other case-back variants besides the earliest one shown above.

49999

4420-9990 (this is the later model number version of the 49999, but is otherwise the same watch, apart from a difference in the printing on the dial) - photo, this example has its original case lines, but an incorrect crown, which I think looks like a 52KS one rather than the correct one for this model, which I believe should look like the crown for the 44-9990 above:




Photos of my other examples:

4502-7000 - note that my example has a dial that has patinated/toned to a brownish/champagne shade, whereas it should be silver, but the case is in nice shape and the case-lines are very sharp, and it has its original crown:




4502-7010 - this has a linen dial, though it's hard to make out in my photo, and the case is in good shape with its original lines and brushed texture, and its original crown:




5626-7111 - my example is in nice shape, with its original shape case-lines and crown, and retains its original brushing on the thin angled lines on the lugs closest to the strap, which you might just be able to make out in the photo, though it's difficult, which is another distinguishing feature from the 5625/6-7000, apart from its narrower, pointier lugs:




5626-7041 - my example retains all its original sharp case-lines and finishing and crown:




5626-7121 - this has a vertical-lines-brushed textured dial, though it's difficult to see in my photo, and has its original crown. Note that the bracelet shown is not original to this model:




5626-5030 - this also has the same vertical-lines-brushed textured dial as the 5626-7121 above, though it's difficult to see in my photo. This watch has a screw-on case-back. There are earlier versions of this watch with the gold medallion like the early version of the 5625/6-7110, and later versions without the medallion and with a stamped KS instead, like the 5625/6-7111. My example has its original crown, and also some dial damage at the bottom of the dial, which seems to be not uncommon on this model:




5256-8010, with its original crown - though my example is not as nice as the one above:




Perhaps it might help to split up the 5621s from the 5625s from the 5626s from the 5245s from the 5246s from the 5256s to make each section of the list a bit shorter as easier to read?

I think it would also help if you made your explanatory notes a bit clearer/longer to more explicitly distinguish what the differences between the models are - for example, I don't know what you mean by "graduation" on the 5625-7111, and why it's not also on the 5626-7111. What do you mean by "big" and "unique"? What does "+ special version" mean on the 5621-7022?


Hey, i want to buy a JDM King Seiko, it's an 4402-8000. The watch has the "horseshoe" medallion on the back case. About the condition,
Case : in vintage condition with some scratches and dings
Crystal : minor scratches or dings
Dial : Untouched, Visible signs of oxidation on the dial near the rim.
 

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