About This Watch
The Seiko Prospex Alpinist SPB121 exemplifies Seiko's dedication to horological excellence. Built for professionals who push boundaries, the Prospex line delivers robust tool watches designed for land, sea, and air adventures. Powered by the Seiko 6R35 with approximately 70 hours of power reserve, this 39.5mm Stainless Steel case houses a movement that represents years of refinement and innovation. Designed for outdoor enthusiasts and adventurers, this watch combines rugged reliability with everyday wearability. The legible dial and robust construction make it equally at home on mountain trails and city streets. Water resistant to 200 meters, it combines practical durability with refined aesthetics that discerning collectors appreciate. Founded in 1881 by Kintaro Hattori in Tokyo, Seiko has been at the forefront of horological innovation for over 140 years. From creating Japan's first wristwatch to pioneering quartz technology and the revolutionary Spring Drive movement, Seiko continues to push boundaries while maintaining exceptional value.
Specifications
Movement
| Movement Type | Automatic |
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| Caliber | Seiko 6R35 |
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| Power Reserve | 70 hours |
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| Frequency | 21,600 vph |
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| Jewels | 24 |
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Case
| Case Diameter | 39.5mm |
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| Case Thickness | 13.2mm |
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| Case Material | Stainless Steel |
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| Crystal | Sapphire with anti-reflective coating |
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| Bezel | Fixed compass rotating inner bezel |
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| Dial Color | Green |
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| Lug Width | 20mm |
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| Lug-to-Lug | 47.0mm |
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Features
| Water Resistance | 200m / 656ft |
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| Bracelet/Strap | Stainless steel bracelet |
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| Clasp | Three-fold clasp with push button release |
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| Weight | 163g |
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| Complications | DateCompass Bezel |
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