Seiko Cal. 6640 - 342

Seiko 6640-342

This Hand-Winding model from 1974 features a 44mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 34j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-2f79a1628167]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
13.1mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Blue Sunburst
Jewels
34j
Frequency
21,600 bph
Power Reserve
43 hours
Year
1974

Related Models

seikata-wm-2f79a1628167