Seiko Cal. 4423 - 664

The Seiko 4423-664 represents an important milestone in Seiko's 1966 lineup. Powered by the 4423 caliber with 21j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-b7aa0d84179c]

Also known as: Bullhead, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1966

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