Seiko Cal. 5666 - 730

The Seiko 5666-730 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-86286e71e6a0]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1965

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