Lovely story about one of these on Wikipedia:
In 1950 the former mechanic Václav Uhlík from Líně in the Czech Republic found the wreck of an RR-7 artillery tractor. He repaired and rebuilt the machine as an armoured carrier. On 25 July 1953 he got through three border zones including wire obstacles, and penetrated thirty kilometres into West German territory. There he applied for asylum and emigrated to the United States, where the machine was exhibited as the "freedom tank" (Czech: tank svobody).
To be read with your choice of NaCL.
https://en.m.wikipedia.org/wiki/SdKfz_254There is a period photograph on the Surviving Panzers web site.