Seiko Cal. 5643 - 231

This Solar model from 1979 features a 34mm PVD Black case. With its 22mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-1df422fdb7e9]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1979

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