Saw some of these German tanks on tours of Aberdeen Proving Ground during my 1961 or 1963 Engr EOOC school at Ft Belvoir, VA. Also demo of multi barreled Vulcan during one of these tours.
Abderdeen had a couple of Tigers, including a armor cutaway King Tiger that was eventually displayed at Knox.
The largest of the WWII German Tanks at Knox when I was there [1960s] was a Panther V. I had to go to Aberdeen and talk very nicely to Col. Jarrett to learn to drive *his* Tigers.