DESCRIPTION This timepiece is from the Alpinist collection, first launched in 1959 exclusively for the Japanese market. Designed for Japanese ‘Yama-otoko’ mountain men, to be reliable in treacherous terrain, these are part of the Land collection. Hugely popular with many fans worldwide, these new designs are now available globally with an upgraded specification from their original inspiration – a longer power reserve of 70 hours and a glass upgrade to Sapphire glass. Seiko Prospex watches are designed for sports lovers and adventure seekers in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.
DESCRIPTION This timepiece is from the Alpinist collection, first launched in 1959 exclusively for the Japanese market. Designed for Japanese ‘Yama-otoko’ mountain men, to be reliable in treacherous terrain, these are part of the Land collection. Hugely popular with many fans worldwide, these new designs are now available globally with an upgraded specification from their original inspiration – a longer power reserve of 70 hours and a glass upgrade to Sapphire glass. Seiko Prospex watches are designed for sports lovers and adventure seekers in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.
DESCRIPTION This timepiece is from the Alpinist collection, first launched in 1959 exclusively for the Japanese market. Designed for Japanese ‘Yama-otoko’ mountain men, to be reliable in treacherous terrain, these are part of the Land collection. Hugely popular with many fans worldwide, these new designs are now available globally with an upgraded specification from their original inspiration – a longer power reserve of 70 hours and a glass upgrade to Sapphire glass. Seiko Prospex watches are designed for sports lovers and adventure seekers in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.
DESCRIPTION This timepiece is from the Alpinist collection, first launched in 1959 exclusively for the Japanese market. Designed for Japanese ‘Yama-otoko’ mountain men, to be reliable in treacherous terrain, these are part of the Land collection. Hugely popular with many fans worldwide, these new designs are now available globally with an upgraded specification from their original inspiration – a longer power reserve of 70 hours and a glass upgrade to Sapphire glass. Seiko Prospex watches are designed for sports lovers and adventure seekers in the water, in the sky or on land. Since launching Japan’s first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.
Last updated at 07/19/2026 19:40:32
Seiko SPB121J
Free delivery
Seiko Alpinist SPB121J1 Steel Green 39.5mm 2025
Free delivery
Seiko Men's Stainless Steel Green Watch SPB121J
Free delivery
SEIKO Watch Prospex SPB121J
Free delivery between 29–31 July
Seiko Prospex Alpinist Spb121j1/sbdc091 Brown Green Express / Genuine
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
| Movement Type | Automatic with manual winding capacity |
| Accuracy | +25 to -15 seconds per day |
| Case Material | Stainless steel |
| Crystal | Sapphire with magnifier |
| Crystal Coating | Anti-reflective coating on inner surface |
Seiko SPB121J
Free delivery
Seiko Alpinist SPB121J1 Steel Green 39.5mm 2025
Free delivery
Seiko Men's Stainless Steel Green Watch SPB121J
Free delivery
SEIKO Watch Prospex SPB121J
Free delivery between 29–31 July
Seiko Prospex Alpinist Spb121j1/sbdc091 Brown Green Express / Genuine
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
| Movement Type | Automatic with manual winding capacity |
| Accuracy | +25 to -15 seconds per day |
| Case Material | Stainless steel |
| Crystal | Sapphire with magnifier |
| Crystal Coating | Anti-reflective coating on inner surface |
