Seiko Cal. 6640 - 534

This Spring Drive model from 1997 features a 34mm Hardlex-Coated Steel case. With its 19mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-cdf4afd887bb]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1997

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