Seiko Cal. 5666 - 160

The 5666-160 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-f08e6c76e7fa]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1972

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