Seiko Cal. 4487 - 987

The 4487-987 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-4bfeb167f0fa]

Also known as: Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1974

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