Seiko Cal. 6331 - 638

This Hand-Winding model from 1972 features a 41mm Hardlex-Coated Steel case. Powered by the 6331 caliber with 18j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-9515041bfc86]

Also known as: Emperor, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1972

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