Seiko Cal. 4490 - 650

The Seiko 4490-650 represents an important milestone in Seiko's 1970 lineup. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-3589534e22e2]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1970

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