Seiko Cal. 4431 - 806

The Seiko 4431-806 represents an important milestone in Seiko's 1966 lineup. Powered by the 4431 caliber with 31j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-5660cb5458fd]

Also known as: Tuna, World Timer

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1966

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