For my 750th puzzle I decided to ask your help to solve a mystery that I haven't been able to solve yet.
The car has been posted before and is easily identified.
However the two photos below show the car in the pits and during the race at the Le Mans 24hrs.race in 1952.
You will notice that the front has changed quite radically.
What I'd like to know, for a point, is what was the reason for this?