Seiko Cal. 6643 - 831

Seiko 6643-831

This Quartz model from 1979 features a 38mm Titanium case. Powered by the 6643 caliber with 21j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-4c44ca0b22b2]

Also known as: Shogun

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
38mm
Case Thickness
8.1mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
80m
Dial Color
Champagne
Jewels
21j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1979

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