Seiko Cal. 4431 - 850

The Seiko 4431-850 represents an important milestone in Seiko's 1966 lineup. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0b6cb711cf38]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Burgundy

Jewels

26j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1966

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