Seiko Cal. 4487 - 998

The Seiko 4487-998 represents an important milestone in Seiko's 1991 lineup. With its 18mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-1fda0dca630d]

Also known as: Helmet, Navigator

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1991

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