Seiko Cal. 5640 - 923

This Solar model from 1974 features a 41mm Two-Tone case. With its 21mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-1effbce11cf8]

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1974

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