Seiko Cal. 5635 - 981

This Hand-Winding model from 1971 features a 37mm Hardlex-Coated Steel case. With its 20mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-13715fbcadd6]

Also known as: Monster, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1971

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