Seiko Cal. 4431 - 348

The Seiko 4431-348 represents an important milestone in Seiko's 1974 lineup. Powered by the 4431 caliber with 27j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-043e9d115e85]

Also known as: Sumo, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Champagne

Jewels

27j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1974

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