Seiko Cal. 6639 - 715

This Solar model from 1988 features a 36mm PVD Black case. With its 22mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-568fcb4d3f71]

Also known as: Sumo, Bellmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1988

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