Seiko Cal. 6620 - 636

This Hand-Winding model from 1967 features a 43mm Two-Tone case. With its 19mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-cf45a433142c]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1967

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