Seiko Cal. 4487 - 310

The Seiko 4487-310 represents an important milestone in Seiko's 1991 lineup. Powered by the 4487 caliber with 26j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-e0ebd6406379]

Also known as: Shogun, Arnie

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1991

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