Seiko Cal. 4487 - 669

The Seiko 4487-669 represents an important milestone in Seiko's 1991 lineup. Powered by the 4487 caliber with 29j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-0a86abaff95b]

Also known as: Bullhead, Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1991

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