Seiko Cal. 4481 - 644

This Kinetic model from 1971 features a 38mm PVD Black case. Powered by the 4481 caliber with 34j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-afc7e78ed7d9]

Also known as: Sumo, Bellmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

38mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1971

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