Seiko Cal. 4487 - 531

The Seiko 4487-531 represents an important milestone in Seiko's 1967 lineup. Powered by the 4487 caliber with 24j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-4e19203f0e42]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1967

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