Seiko Cal. 5641 - 857

This Hand-Winding model from 1968 features a 34mm Hardlex-Coated Steel case. With its 22mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-ac67bae2b6e6]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1968

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