Seiko Cal. 5639 - 966

Seiko 5639-966

The 5639-966 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5639 caliber with 30j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-3d99b63f2671]

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
43mm
Case Thickness
11.2mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
170m
Dial Color
Green
Jewels
30j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1976

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