Seiko Cal. 5640 - 779

This Spring Drive model from 1991 features a 38mm Hardlex-Coated Steel case. With its 18mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-3473128a0b45]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1991

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