Seiko Cal. 6371 - 977

Seiko 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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