Seiko Cal. 5639 - 791

The 5639-791 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5639 caliber with 35j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-54fb54f3abab]

Also known as: Bellmatic, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1974

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