Seiko Cal. 4431 - 439

The Seiko 4431-439 represents an important milestone in Seiko's 1999 lineup. Powered by the 4431 caliber with 20j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-0cd3cdd09625]

Also known as: Rally, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1999

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