Seiko Cal. 5631 - 465

The 5631-465 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5631 caliber with 26j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-d64babbabeb3]

Also known as: Monster, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1972

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