Seiko Cal. 6640 - 550

This Solar model from 1994 features a 40mm Two-Tone case. With its 19mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-e7f3f48fb8b5]

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1994

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