You have two stunning Pateks.
And the 5960 is most definately on my "Would like to own" list.
I also have to agree with you in regards to your conclusions between the Calatrava Cross and the more traditional tang buckle.
And on a side note if its not too much of a personal question, but which age bracket do you fall within.
It;s just that I was intrigued by your "Father & Grandfather" observation.
Of which I full into both!!!