Seiko Cal. 6657 - 192

This Spring Drive model from 1980 features a 46mm Stainless Steel case. With its 19mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-52f8460ab51c]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1980

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