Seiko Cal. 6631 - 139

This Solar model from 1977 features a 41mm PVD Black case. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-e04474dcf49d]

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1977

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