Seiko Cal. 0731 - 422

The Seiko 0731-422 represents an important milestone in Seiko's 1990 lineup. Powered by the 0731 caliber with 30j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-ea3146e7639c]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1990

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