Seiko Cal. 4531 - 640

Seiko 4531-640

This Spring Drive model from 1977 features a 41mm Two-Tone case. With its 21mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-7f5491ba0b8e]

Also known as: Panda

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
41mm
Case Thickness
9.0mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
27j
Frequency
28,800 bph
Power Reserve
58 hours
Year
1977

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