Seiko Cal. 6639 - 674

Seiko 6639-674

This Hand-Winding model from 1979 features a 36mm Hardlex-Coated Steel case. Powered by the 6639 caliber with 22j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-eef54c3002ac]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
15.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
170m
Dial Color
Blue Sunburst
Jewels
22j
Frequency
21,600 bph
Power Reserve
51 hours
Year
1979

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