Seiko Cal. 4487 - 171

The Seiko 4487-171 represents an important milestone in Seiko's 1973 lineup. Powered by the 4487 caliber with 24j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-d6573a9fa2e2]

Also known as: UFO, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1973

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