Seiko Cal. 0731 - 555

The Seiko 0731-555 represents an important milestone in Seiko's 1973 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-2e53fa7d48b2]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1973

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