Seiko Cal. 5640 - 586

Released in 1981, the Cal. 5640 with design code 586 was part of Seiko's domestic market collection. Powered by the 5640 caliber with 21j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-956007444b00]

Also known as: UFO, Rally

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1981

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