Seiko Cal. 6642 - 640

This Solar model from 1984 features a 37mm PVD Black case. With its 22mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-b637f523ea66]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1984

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