Seiko Cal. 6378 - 857

This Spring Drive model from 1975 features a 41mm Gold-Plated case. With its 18mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-45f1f25de992]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1975

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