Seiko Cal. 6663 - 731

The Seiko 6663-731 represents an important milestone in Seiko's 1976 lineup. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-2f759082a4c6]

Also known as: UFO, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1976

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