Seiko Cal. 4490 - 633

The Seiko 4490-633 represents an important milestone in Seiko's 1983 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-6d64ec9cd64c]

Also known as: Helmet, Arnie

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1983

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