Seiko Cal. 4490 - 911

This Automatic model from 1981 features a 40mm Hardlex-Coated Steel case. Powered by the 4490 caliber with 35j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-5dc049a7697f]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1981

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