Seiko Cal. 4487 - 642

The 4487-642 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4487 caliber with 26j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-46c91ed97a3f]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1967

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