Seiko Cal. 5631 - 744

The 5631-744 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5631 caliber with 25j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-29aad6932ecc]

Also known as: UFO, Goldfeather

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1986

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