Seiko Cal. 6640 - 476

This Quartz model from 1977 features a 46mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 29j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-c218c6e5fb29]

Also known as: Samurai, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1977

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