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  1. Watches - Private Sellers and Sponsors
    Decided to let go of this nice piece, just don’t seem to wear it and let someone else enjoy it. May end up regretting it later. Full kit minus rubber strap but have two extra Strapcode bracelets, around a $200 value. OEM bracelet was not worn much. Watch is in great condition with no major...
    $2,350 USD
  2. Watches - Private Sellers and Sponsors
    Decided to let go of this nice piece, just don’t seem to wear it and let someone else enjoy it. May end up regretting it later. Full kit minus rubber strap but have two extra Strapcode bracelets, around a $200 value. OEM bracelet was not worn much. Watch is in great condition with no major...
    $2,350 USD
  3. Watches - Private Sellers and Sponsors
    Condition: preowned Movement: Seiko Hi-Beat Crystal: mineral crystal Case: steel monocoque case Dimensions: 44mm Caseback: monocoque Crown: screw-down Dial: black dial Strap/bracelet: uncle seiko chocolate bar rubber strap WR: 300 meters (not guaranteed) as this is a vintage piece. This is an...
  4. Watches - Private Sellers and Sponsors
    SOLD!! Up for sale is an excellent condition Seiko Marinemaster 300 SLA021J. This watch is gorgeous, and the Grand Seiko 8L35B is running incredibly! It is in excellent condition, the only thing I see is a pinhole mark between the ceramic bezel and the stainless insert at the43 mark. You will...
  5. Watches - Private Sellers and Sponsors
    I bought this new from an AD in the spring of 2020 and wore it maybe a handful of times since then. Time to move it on to a new owner. It's a gorgeous watch and the red accents on the watch face look great against all the black. Bezel and crown both turn as they should and seems to be keeping...
  6. Public Forum
    I've had my MM300 for about a month now. I'm still very much in the honeymoon phase, but honeymoon phases don't last long for me if the watch does anything that annoys me. Poor accuracy or precision is one of the things that annoys me. Thankfully, this hasn't been the case. My SLA023 is fine...
  7. Public Forum
    Hello WUS Community looking to add a diver into my collection i am leaning towards a sla021 seiko marine master, as i am a seiko-path and find some novelty owning the ultimate seiko (diver). With the raw (unregulated and finished) GS movement, zaratsu polishing, and lack of any decently...
  8. WTB - Wanted to Buy
    WTB SBDX017 /SLA021 Bezel, preferably new condition
  9. Watches - Private Sellers and Sponsors
    Hi WUS - I just bought a smart trainer for winter cycling, so making a tough call and reposting my MM300 SBDX017 for sale to cover the cost. Asking $1750 including express, insured shipping. Condition: Overall, the piece is in good condition. In the spirit of full disclosure, it has not been a...
  10. Reviews
    Introduction I've critiqued Seiko's upmarket push before, so I will admit it is a bit ironic that I ended up purchasing Prospex LX diver. However, the price I paid was too good to pass up (almost 50% off msrp), so I regret almost nothing. Here is my impression and review of the limited edition...
  11. Watches - Private Sellers and Sponsors
    ***Re-posting with updated price*** Need to fund a purchase, so making a tough call and posting my MM300 SBDX017 for sale. It's a truly special - and hard to find - watch, just can't justify having more watches than I can wear in my rotation. Overall, the piece is in great condition...
  12. Watches - Private Sellers and Sponsors
    Up for sale is my limited edition green Seiko MarineMaster SLA019. I purchased this new from an AD in August 2018 so there is still some time left on the warranty but everything is functioning as it should be so there should be no worries. This is number 808 of the run of 1,968 pieces. I've got...
  13. Seiko
    Hi there, I have long thought of buying the MM and I am very close to actually doing it. I cannot easily describe how beautifully the gloss of that bezel plays with the coated hardlex crystal. The combination is simply one of the most beautiful watch faces I know. I have found a decent offer...
  14. Watches - Private Sellers and Sponsors
    For sale is my Seiko MarineMaster 300 (SBDX017). I bought it from a reddit user in March this year. Does not get enough wrist time so moving it on. Condition: Watch is in used but very good condition. No scratches on crystal. The hands, indices and chapter ring are perfectly aligned. Bezel...
  15. Watches - Private Sellers and Sponsors
    For sale is my Seiko Marinemaster 300 reference SBDX017 (aka MM300). This has been my grail watch for a long time and has gained a cult -like status among WIS members. I am selling to chase another grail. You guys know how this works. The watch is in excellent condition, winds smoothly, keeps...
  16. Watches - Private Sellers and Sponsors
    I am in tears as I write this, but sadly I am in desperate need of cash so I have to offer up one of my absolute favorite watches from my collection. The SBDX012 MM300, 50th Anniversary Limited Edition of 1000 with gilt gold accents. It's all the beauty and glory of the regular MM300 with some...
  17. Watches - Private Sellers and Sponsors
    SEIKO MARINEMASTER 300 SBDX012 50th Anniversary Limited Edition For sale is my limited edition MM300 number 823/1000. Very good condition. SOLD SOLD: $2,199 includes shipping CONUS Seiko introduced Marinemaster 300 50th Anniversary Edition in 2015 to celebrate 50 years of producing dive...
  18. Watches - Private Sellers and Sponsors
    Hello, I bought this watch last month from Higuchi before they would all disappear. Then last week I found my long awaited grail piece so I had buy it. Now I will no longer be needing this MM300. The watch is basically new. I wore it very gently for a couple of weeks. It has not come in contact...
  19. Watches - Private Sellers and Sponsors
    I'm offering for sale a Seiko SBDX001 Marinemaster 300, aka MM300, that I purchased from Japanese AD Chino in November, 2014. The sale includes the full kit: box, papers, stamped warranty card, unused OEM rubber strap, and extra bracelet links. Asking SOLD $1,200 USD SOLD Thank you WUS and...
  20. Watches - Private Sellers and Sponsors
    SOLD SOLD Up for sale is my mint Seiko Marinemaster MM300, purchased new from Higuchi in Apr 2014. Watch case/head is in like new condition as there is not a single mark on the case, bezel or crystal. Please excuse the lint on the crystal in the pictures. OEM bracelet is in excellent condition...
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