Seiko Cal. 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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