Seiko Cal. 5278 - 741

The Seiko 5278-741 represents an important milestone in Seiko's 1965 lineup. With its 20mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-ef1a3f1cafc7]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1965

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