Seiko Cal. 4423 - 638

The 4423-638 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4423 caliber with 28j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-5df16740879b]

Also known as: Navigator, Arnie

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

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