Seiko Cal. 6640 - 476

Seiko 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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