I have also found a tchecoslovaquian Porsche site where I found the answer to my questions :
Jaroslav Juhan picture and a spyder number 56 was taken during the 1954 Carrera Panamericana he finished 4th behind Hans Hermann number 55
Jaroslav Juhan picture and a spyder number 56 was taken during the 1954 Carrera Panamericana he finished 4th behind Hans Hermann number 55
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