Seiko Cal. 4463 - 937

This Spring Drive model from 1974 features a 45mm PVD Black case. Powered by the 4463 caliber with 25j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-19774a36cde9]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1974

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