Seiko Cal. 6631 - 416

This Hand-Winding model from 1985 features a 35mm Gold-Plated case. Powered by the 6631 caliber with 34j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-20420164b7a1]

Also known as: Bullhead, Navigator

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1985

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