Seiko Cal. 6643 - 774

This Quartz model from 1981 features a 34mm Hardlex-Coated Steel case. Powered by the 6643 caliber with 25j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-f3836e9a24e7]

Also known as: Helmet, Rally

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1981

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