Seiko Cal. 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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