Seiko Cal. 5639 - 301

The 5639-301 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5639 caliber with 23j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-f25949a226a9]

Also known as: UFO, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

23j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1986

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