Seiko Cal. 5641 - 623

This Spring Drive model from 1978 features a 43mm Titanium case. With its 21mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-2c9aff052e9d]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1978

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