Seiko Cal. 5631 - 465

The Seiko 5631-465 represents an important milestone in Seiko's 1968 lineup. Powered by the 5631 caliber with 30j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-2d2c283ccde2]

Also known as: Goldfeather, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1968

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