Seiko Cal. 6639 - 151

This Hand-Winding model from 1969 features a 38mm PVD Black case. With its 22mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-2073f10f4d27]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1969

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