Seiko Cal. 4431 - 846

The Seiko 4431-846 represents an important milestone in Seiko's 1968 lineup. Powered by the 4431 caliber with 31j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-8e06502cf6c8]

Also known as: Helmet, Arnie

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1968

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