Rusty, Dave, 31Tudor, D.J. and Tiny,
Thanks so much for responding to my post. I am always learning.
In particular from the responses to this post, I learned how to quickly look at a set of kingpins and make use it is model A era and it appears the K marking was not unique to just the kingpins.
Tiny may be unable to unlock the mystery if he stumbles across the magazine article again.
Thanks - Hunter