Seiko Cal. 5639 - 277

Seiko 5639-277

The 5639-277 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5639 caliber with 25j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-968ed1bd4d13]

Also known as: Monster, Bellmatic

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
46mm
Case Thickness
9.9mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
110m
Dial Color
White
Jewels
25j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1988

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seikata-wm-968ed1bd4d13