Seiko Cal. 6645 - 631

This Solar model from 1969 features a 43mm PVD Black case. With its 21mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-990df79b3ce2]

Also known as: Rally, Sea Horse

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

31j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1969

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