Seiko Cal. 6640 - 777

This Hand-Winding model from 1984 features a 44mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 34j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-de5ff383e301]

Also known as: Shogun, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1984

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