Seiko Cal. 5666 - 999

The Seiko 5666-999 represents an important milestone in Seiko's 1965 lineup. With its 18mm lug width and 14.7mm profile, it sits comfortably on most wrists. [seikata-wm-439680623989]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

35j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1965

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