Seiko Cal. 5666 - 714

The Seiko 5666-714 represents an important milestone in Seiko's 1967 lineup. With its 20mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-165ca1876cde]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

26j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1967

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