Seiko Cal. 4437 - 819

This Spring Drive model from 1974 features a 43mm PVD Black case. Powered by the 4437 caliber with 20j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-c3c717703233]

Also known as: Sumo, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1974

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