Seiko Cal. 6644 - 377

This Spring Drive model from 1980 features a 43mm Gold-Plated case. Powered by the 6644 caliber with 30j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-40db27ecc44d]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

30j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1980

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