Seiko Cal. 4531 - 563

This Spring Drive model from 1972 features a 42mm PVD Black case. Powered by the 4531 caliber with 20j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-736e73e34395]

Also known as: Samurai, Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1972

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