Seiko Cal. 4446 - 509

The Seiko 4446-509 represents an important milestone in Seiko's 1972 lineup. Powered by the 4446 caliber with 24j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-bc91fbc769f1]

Also known as: World Timer, Crown

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1972

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