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Seiko SPB121 Prospex Men's Watch Brown 39.5mm Stainless Steel

  • Based on 61 reviews
Condition: New
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$725.00 Why this price?

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Availability: 12 left in stock
Fulfilled by Amazon

Arrives Sunday, Jun 15
Order within 23 hours and 11 minutes
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Product Dimensions ‏ : ‎ 5 x 5 x 4 inches; 1 Pounds


Item model number ‏ : ‎ SPB121


Department ‏ : ‎ mens


Date First Available ‏ : ‎ June 2, 2022


Manufacturer ‏ : ‎ Seiko


Brand, Seller, or Collection Name: SEIKO


Model number: SPB121


Part Number: SPB121


Item Shape: Round


Dial window material type: Sapphire


Display Type: Analog


Clasp: Foldover Clasp With Push Button


Case material: Stainless Steel


Case diameter: 39.5 millimeters


Case Thickness: 13 millimeters


Band Material: Leather


Band width: 20


Band Color: Brown


Dial color: Green


Calendar: Date


Special features: Second Hand


Item weight: 16 ounces


Movement: Automatic


Water resistant depth: 200 Meters


Product Warranty: For warranty information about this product, please click here


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Seiko tool watch
I love my watch. The compass is fun to use while I'm walking in the woods. I enjoy telling the time and looking at the beautiful dial. A great and iconic tool watch
Reviewed in the United States on March 5, 2025 by Bobby Smith

  • Arrived early, 100%authentic!
I could not be happier! This has been the one watch I e wanted to add to my collection for some time now. I was so happy to find a lower price than retail and to have it arrive a full week before the expected delivery date. The unpacking process was so much fun too since I wasn’t sure if it might be a 1-1 clone. It is 100% authentic and absolutely beautiful! ... show more
Reviewed in the United States on December 28, 2024 by Joshua Joshua

  • Excelente
Excelente!
Reviewed in the United States on January 30, 2025 by Juan Abarca

  • Beautiful and Stylish
Removed one star for the weird band clasp Not at all good for smaller wrists.
Reviewed in the United States on December 17, 2024 by Richard

  • Seiko Prospex Alpinist
Looks great! Came ahead of schedule in nice packaging, super excited to finally have this watch!
Reviewed in the United States on December 27, 2024 by jonathan mogan

  • Love this watch
Though it is bit smaller for my taste (39.5 mm) this is a fantastic watch. I love the detail, green dial and stainless steel bezel. The strap is good. Rotating compass built in is nice. Everything about this watch is to my liking. For the money it is a good daily wear.
Reviewed in the United States on August 26, 2024 by JA-2015

  • I have to say I love this watch , accuracy is spot on , reserve power is nice!
Okay I have several self-winding watches, from a Omega Seamaster Ocean to a Seiko SKX007. I try to wear them all. The SPB121 is my latest. Things I like, it has kept great time from the get-go. The Sapphire crystal is another, the power reserve is impressive due to the 6r35 movement and hacking and winding .The only thing I am not crazy with is the band. This would be the perfect adventure watch with a band that makes sense. Seiko has a track record of putting okay bands on their watches, so I am not going to penalize them for what I know they do. So yes, I would buy it again. Keep on keeping time folks. ... show more
Reviewed in the United States on April 21, 2024 by eta

  • Beautiful watch
The Alpinist is one of Seikos iconic models.
Reviewed in the United States on December 31, 2024 by Stuart Clark

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