Seiko Cal. 4490 - 650

Seiko 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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