Seiko Cal. 5633 - 581

This Hand-Winding model from 1972 features a 43mm PVD Black case. With its 21mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-c9ca9c599cee]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1972

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