Seiko Cal. 6640 - 529

Seiko 6640-529

This Spring Drive model from 1981 features a 42mm Stainless Steel case. It features a Silver dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-5454c0ac5379]

Also known as: Flighty

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
12.0mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
100m
Dial Color
Silver
Jewels
36j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1981

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seikata-wm-5454c0ac5379