Seiko Cal. 5666 - 761

Released in 1983, the Cal. 5666 with design code 761 was part of Seiko's domestic market collection. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-6e13cea15ef2]

Also known as: UFO, Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1983

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