Seiko Cal. 4487 - 256

The 4487-256 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4487 caliber with 20j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-a97b3df1e5a4]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1968

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