Seiko Cal. 6371 - 977

The 6371-977 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6371 caliber with 21j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-aa2d10ab63ff]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1971

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