Seiko Cal. 5639 - 712

Seiko 5639-712

The 5639-712 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5639 caliber with 26j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-8d60cb69611a]

Also known as: Monster, World Timer

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
38mm
Case Thickness
13.9mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
180m
Dial Color
Burgundy
Jewels
26j
Frequency
36,000 bph
Power Reserve
45 hours
Year
1993

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seikata-wm-8d60cb69611a