Seiko Cal. 4490 - 870

The Seiko 4490-870 represents an important milestone in Seiko's 1970 lineup. Powered by the 4490 caliber with 30j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-36a3fcf6f8dc]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1970

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