Seiko Cal. 6640 - 748

Seiko 6640-748

This Hand-Winding model from 1976 features a 43mm Gold-Plated case. With its 18mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-b2d9a42bb155]

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
12.5mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
120m
Dial Color
Champagne
Jewels
23j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1976

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seikata-wm-b2d9a42bb155