Seiko Cal. 6640 - 352

Seiko 6640-352

This Automatic model from 1980 features a 40mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 23j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-e8c3d7477b02]

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.8mm
Lug Width
19mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
80m
Dial Color
Navy
Jewels
23j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1980

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