Just scanned some transparencies from a trip to France in 1961.
Approaching the city early in the morning. Or maybe it's evening, the cathedral suggests west is on the right. PS. Just checked Monet's paintings of Rouen cathedral, and the spires are at the west end, so this is morning sun from the east.
The fire brigade.
Street in the city centre.
Exakta II (1948/9), Enna Ennalyt 85mm/1.5 (1959), Ektachrome.
These transparencies had faded badly and needed considerable colour correction (very weak in green and blue, dominated by red).
Your ambulance looks a fine collector's piece now.
And it does have the manufacturer's badge on the grill. My 1961 fire engine is anonymous. My subconscious, brought up on 1950s black Marias, is whispering "Peugeot". But I really don't have a clue who built it.