Seiko Cal. 5666 - 275

This Spring Drive model from 1982 features a 41mm Stainless Steel case. With its 20mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-fb137545a533]

Also known as: Helmet, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1982

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