Seiko Cal. 5631 - 935

Seiko 5631-935

The Seiko 5631-935 represents an important milestone in Seiko's 1997 lineup. Powered by the 5631 caliber with 24j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-41b127d99ceb]

Also known as: Helmet, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
14.3mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
70m
Dial Color
Black
Jewels
24j
Frequency
21,600 bph
Power Reserve
60 hours
Year
1997

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