Seiko Cal. 4431 - 494

The Seiko 4431-494 represents an important milestone in Seiko's 1971 lineup. Powered by the 4431 caliber with 35j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-afcf899832cf]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1971

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