This Trojan was TOC by the USAF as 51-3647 but by 1959 was flying for the AdlA as a Fennec with serial 29 and finally from circa 1966 as 1-A-255 with the Armada de la Republica Argentina. By 1993 the plane was on the US register as N992CA and in the following years became C-GLPM, N28FE/X28FE, ZU-FAA, HB-RDM before being registered HA-RDM in June 2021. I was very happy to see it at this very nice air show.