Seiko Cal. 6639 - 704

Seiko 6639-704

This Quartz model from 1983 features a 44mm Hardlex-Coated Steel case. Powered by the 6639 caliber with 20j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-c0bad34e761d]

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
14.0mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
150m
Dial Color
Green
Jewels
20j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1983

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