Interesting post...

-Like you, i have never seen any caseback with the letter "C" after DW-5600.

My first thought is that Shockbase have made / mixed something wrong.

When you check the spare parts for the DW-5600-1V on Shockbase, both the o-ring and screws are for the DW-5600E-1V.

 

I'm sure the buyer is mistaken. The backs never had the letter C (or other letters) in the model designation. I have several watches of the 80's with screw-back, and none of them have the letter C in the designation.
The letter C in the designation of older models indicated the presence of a resin strap. This can be seen in old catalogs. For example DW-1000/1000C and TW-7000/7000C:

Also, we shouldn't rule out errors in shockbase, as it is unofficial and maintained by enthusiasts.

 

Well I did think I was correct. He says he's going to send me photos🤷‍♂️.

I believe one of the guys who runs S/Base is a WUS/F17 member, but I can never remember who it is😂.

 

There is no DW-5600-1V. All black DW-5600 models with the 691 and 901 modules have the suffix ‘C’.
The ‘C’ stands for metal case with plastic strap.
The DW-5600C-1V is available as an export model with the inscription ‘Water 200M Resist’ on the glass.
The DW-5600C-1 (without ‘V’) is the version for the Japanese market. It says ‘Water 20 BAR Resist’ on the glass.
See the pictures above.

 

Buyer is wrong. The 1V is just a variation with some minor differences.

DW-5600 Model Versions ? The First Nine ? An Illustrated...

DW-5600 Model Versions - The First Nine - An Illustrated Guide Since the DW-5600 is the most popular of the early G-Shocks it seemed that it may be a good idea to put together a simple guide to the early versions that were available with a bit of information and a pic of each. Sort of an...

www.watchuseek.com

 

This is your typical eBay lowballer trying to squeeze out a partial refund. No vintage DW-5600 actually states "C" on the screwback.

 

Yeah, I don't think he's trying that, he's "received the watch with thanks and left feedback", which was positive. The only way he can try that is if it's not as described, which it isn't.

 

Send a link to them and have the buyer post pics in this thread...

 

i have been collecting G-Shocks for about 10 years and ive never seen a vintage with a backplate showing the C. Like asahi mentioned the one with the 20 BAR is a Japaneese market and they normally come with the blue bezel and marble band. When you get it was it only the case?

 

Yeah, I've been doing so since I joined here in 2013. I just asked the question in case I'd ever missed anything, but I didn't think I had.

The 20 Bar versions are very hard to find, I believe they were the Japanese market watches like you say so much more restricted, where as the 200M are what normally comes up for sale.

The blue version you're talking of with the marbled strap is the 5600D-1, but as far as I know all versions were sold in Japan and the rest of the world, so the standard silver and gold with black resins, then the green, blue and yellow versions in both 20 Bar and 200M for each specific market.

Yes, the watch I just sold came without a bezel as is quite normal.

 

In addition to the glass inscriptions, there are also different versions of the screwback finishing and marking:

DW-5600C Caseback Variations -- original casiophile...

The below article was originally published by casiophile on GMT+9. As that forum no longer exists, I have taken the liberty of transcribing casiophile's article and posting it here so that it may be referenced. The article and attached original images are transcribed word for word to the best...

www.watchuseek.com

 

Oh yeah I'm well aware of that "The First Nine" article. In fact when I first found out about it I used it almost as a kind of bible to help me identify and collect some of the screwback styles mentioned in it👍.

 

Nope. Never seen a “C” caseback before.

all my DW5600C with both 691 and 901 dont have “C” on the caseback.

Unless he can show photo, I call a “mistake of identity”.