Seiko Cal. 4487 - 991

The 4487-991 is a sought-after Solar piece from Seiko's golden era. Powered by the 4487 caliber with 17j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-c6da02431cc5]

Also known as: Bullhead, Goldfeather

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1973

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