(1858 – 1913) Wonderful Business Card of French born “Diesel Engine” Inventor, Rudolf Diesel. The front of the card has Diesel’s details, “Dr Ing.h.c Rudolf Diesel, Munchen, Maria Thereseiestr.32”. Diesel has written a note in German to the reverse, adding the sign off to the front of the card. Anything written by Rudolf Diesel is extremely rare and infrequently offered on the market. Diesel died in mysterious circumstances whilst aboard a boat from Antwerp to London where he was due to meet the Consolidated Diesel Manufacturing Company. Some suspect he committed suicide, jumping into the sea, whilst other suspect foul play.