Seiko Cal. 5645 - 383

This Hand-Winding model from 1968 features a 38mm Titanium case. With its 20mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-1d3f4a58e6c3]

Also known as: Helmet, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1968

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