Seiko Cal. 4556 - 391

This Spring Drive model from 1974 features a 38mm Titanium case. With its 19mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-62ee27d604ad]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1974

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