"If you recall anything about this scope, you will know that the cross hairs actually float, so if you move your head while looking through the scope you will see the cross hairs move/point differently."

Typical for higher magnification scopes not having a parallax adjustment on the objective lens. Not so much of a problem with scopes having a magnification below 6X.

I found the 1954 Lee price list interesting. Back then the K3 was priced at $45 and the K4 at $52.50. I bought one of each earlier this year, both in "gently used" condition. The K4 was still in its original box, with no signs of use, and I paid $10 for it. I paid $20 for the K3, no box. The K3 is now on my Remington 550-1 .22, the K4 is on my Remington Nylon 10C. Only complaint I have is fuzziness around the sight picture periphery on both. No perceptible parallax on either one. I have a Weaver K6 mounted on a Remington 700, and I do have to be careful about parallax with it.