Seiko Cal. 6639 - 557

Seiko 6639-557

This Spring Drive model from 1972 features a 36mm Stainless Steel case. With its 18mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-a06c3d4edd5c]

Also known as: Silverwave, Crown

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
12.8mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
28,800 bph
Power Reserve
40 hours
Year
1972

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