Seiko Cal. 0731 - 555

The Seiko 0731-555 represents an important milestone in Seiko's 1986 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-db7c3401088e]

Also known as: Helmet, World Timer

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1986

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