Seiko Cal. 4556 - 723

The Seiko 4556-723 represents an important milestone in Seiko's 1968 lineup. It features a Green dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-39319dfc3e4c]

Also known as: Sportsmatic, Crown

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1968

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