Seiko Cal. 4487 - 521

Released in 1980, the Cal. 4487 with design code 521 was part of Seiko's domestic market collection. Powered by the 4487 caliber with 29j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-f0a8cb2f692d]

Also known as: UFO, Flighty

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1980

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