Seiko Cal. 6633 - 923

This Solar model from 1966 features a 39mm PVD Black case. With its 18mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-70790b86645f]

Also known as: Sumo, Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1966

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