Seiko Cal. 4539 - 990

The Seiko 4539-990 represents an important milestone in Seiko's 1973 lineup. With its 18mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-7f0a878290ec]

Also known as: Sea Horse

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

30j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1973

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