Seiko Cal. 6631 - 314

This Hand-Winding model from 1967 features a 42mm Hardlex-Coated Steel case. Powered by the 6631 caliber with 33j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-672689f74a0e]

Also known as: Samurai, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1967

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