Seiko Cal. 6371 - 420

The Seiko 6371-420 represents an important milestone in Seiko's 1975 lineup. Powered by the 6371 caliber with 25j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-84548ca7a8fb]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

25j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1975

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