Seiko Cal. 6631 - 961

This Solar model from 1972 features a 43mm PVD Black case. With its 18mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-fda7165df2d2]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1972

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