Seiko Cal. 6633 - 981

This Hand-Winding model from 1977 features a 37mm Stainless Steel case. With its 21mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-603854308d4e]

Also known as: Monster, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1977

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