Seiko Cal. 4487 - 645

The 4487-645 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4487 caliber with 25j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-8fcc71e93296]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1974

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