Seiko Cal. 4487 - 681

The Seiko 4487-681 represents an important milestone in Seiko's 1986 lineup. Powered by the 4487 caliber with 24j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-f709cff19bde]

Also known as: Bullhead, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1986

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