What? And When?
Experts?
That might be tough. Is it a shield over engine belts?
It's the Cadillac "Le Monstre", 11th place at Le Mans 1950
Spot on!
A nice puzzle around this car: https://www.autopuzzles.com/forum/2012-41/solved-mjw-825-le-mans-1950-cadillac-le-monstre-at-maison-blanche/