Seiko Cal. 5631 - 765

Released in 1972, the Cal. 5631 with design code 765 was part of Seiko's domestic market collection. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-30e0ef12cf6f]

Also known as: UFO, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1972

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