Seiko Cal. 6178 - 531

This Spring Drive model from 1970 features a 39mm Stainless Steel case. With its 22mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-a27534b48d12]

Also known as: Monster, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Burgundy

Jewels

33j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1970

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