Seiko Cal. 5639 - 767

This Hand-Winding model from 1966 features a 38mm Hardlex-Coated Steel case. With its 20mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-16443250101e]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1966

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