Seiko Cal. 0731 - 599

The Seiko 0731-599 represents an important milestone in Seiko's 1971 lineup. With its 20mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-177d95dfd353]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1971

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