Seiko Cal. 0731 - 435

The Seiko 0731-435 represents an important milestone in Seiko's 1968 lineup. With its 21mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-cd96b5354c90]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1968

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