Seiko Cal. 4597 - 639

The 4597-639 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4597 caliber with 21j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-914e6b8685e6]

Also known as: World Timer, Flighty

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1981

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