Austrian Patent copy, says initial French patent application dates 12. August 1949 dirks-feuerzeuge.de/files/AT177580B-Transfo.pdf Inscription 2. Pz AK 33 seems a bit strange as AK usually means Armee Korps. But there was a 2. Pz.AA 33 with Rommel, then it means 2nd Panzer Aufklärungs Abteilung of Panzer Regiment 33