Seiko Cal. 4420 - 603

The Seiko 4420-603 represents an important milestone in Seiko's 1977 lineup. It features a Green dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-ba87011c08ee]

Also known as: Bullhead, Crown

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1977

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