Automatic 6R35 Movement
Powered by Seiko’s automatic Caliber 6R35 movement, this analog watch includes a date display and stop second hand function.
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Updated 4 months ago
Green-dial automatic field watch with internal compass bezel and classic Alpinist styling.

Powered by Seiko’s automatic Caliber 6R35 movement, this analog watch includes a date display and stop second hand function.
A rotating inner compass bezel supports the field-watch design while preserving the classic Alpinist look.
The stainless steel 39.5 mm case pairs with sapphire crystal featuring a magnifier and inner anti-reflective coating, plus 200 m water resistance.
The Seiko Prospex Alpinist SPB121 is a men's automatic analog field watch with a green dial, classic Alpinist styling, a stainless steel case, calfskin leather band, and an internal rotating compass bezel.
The reviewer describes the watch as a well-built, feature-rich, and visually distinctive timepiece that offers excellent value for money, concluding that it is one of the best affordable watches available for those who appreciate its unique design.
The reviewer notes that while the watch features somewhat polarizing visual complexity and a potentially niche compass complication, the technical updates and in-house specifications represent a clear upgrade, making it a highly wearable and successful everyday option.
The reviewer praises the watch for its iconic, versatile design and exceptional dial, while noting that the stock strap is subpar and the case thickness could be reduced.
The reviewer characterizes the watch as a compelling field watch value that combines heritage styling with modern improvements like a 70-hour power reserve and 200m water resistance, though they caution that its thickness might not suit all wearers.
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| Attribute | Specification | Notes |
|---|---|---|
| Band Material | cow leather (calfskin) | |
| Band Width | 20 mm | mm |
| Battery Life | 2.91667 days | days |
| Case Diameter | 39.5 mm | mm |
| Case Material | stainless steel | |
| Case Thickness | 13.2 mm | mm |
| Clasp Type | three-fold clasp with push button release | |
| Crystal Material | sapphire crystal with magnifier and anti-reflective coating on inner surface | |
| Display Type | analog | |
| Features | date, stop second hand function, rotating inner compass bezel | |
| Gender Target | men's | |
| Movement Type | automatic (Caliber 6R35) | |
| Power Source | automatic | |
| Water Resistance | 200 m | m |

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