Seiko Cal. 5647 - 639

The Seiko 5647-639 represents an important milestone in Seiko's 1980 lineup. Powered by the 5647 caliber with 30j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-3995b0d5f590]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1980

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