Seiko Cal. 0717 - 531

The 0717-531 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0717 caliber with 23j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-b418c8903761]

Also known as: UFO, World Timer

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1975

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