Seiko Cal. 6331 - 656

The 6331-656 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6331 caliber with 21j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-c4efa2b9f887]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1976

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