Seiko Cal. 5639 - 538

The 5639-538 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5639 caliber with 30j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-c2bca5c6a4f9]

Also known as: Goldfeather, World Timer

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1965

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