Seiko Cal. 5640 - 488

Seiko 5640-488

This Spring Drive model from 1982 features a 40mm Gold-Plated case. With its 21mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-5fea3e786aab]

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
8.0mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Navy
Jewels
20j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1982

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