Seiko Cal. 6690 - 628

Seiko 6690-628

This Hand-Winding model from 1971 features a 40mm PVD Black case. Powered by the 6690 caliber with 28j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-a85cbafcb347]

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
40mm
Case Thickness
10.7mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
60m
Dial Color
Navy
Jewels
28j
Frequency
36,000 bph
Power Reserve
40 hours
Year
1971

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