Seiko Cal. 4540 - 724

The Seiko 4540-724 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-013ff9832a0b]

Also known as: Helmet, Rally

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1971

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