Seiko Cal. 4431 - 685

The Seiko 4431-685 represents an important milestone in Seiko's 1968 lineup. Powered by the 4431 caliber with 26j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-ca28ccd54d10]

Also known as: Silverwave, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1968

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