Seiko Cal. 6331 - 116

Seiko 6331-116

This Spring Drive model from 1980 features a 37mm Stainless Steel case. Powered by the 6331 caliber with 24j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-6635c4d07fd8]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
8.9mm
Lug Width
19mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
90m
Dial Color
Green
Jewels
24j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1980

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