Seiko Cal. 6640 - 795

This Hand-Winding model from 1977 features a 41mm Stainless Steel case. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-5be50af28a91]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1977

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