So this was a "141 R": one of a class of over a thousand 282 locomotives ("141" if you count axles instead of wheels-- hence the class designation) built by North American builders at the end of WW II to help the French railways ("SNCF": acronym for the French for "National Railroad Company") recover from the war and occupation. The whole class was built in about a year: an impressive example of what American industry could do under wartime conditions.
There's a Wikipedia article (I found it by Googling "SNCF 141 R" which gives serial numbers for all of these locomotives built by various builders. There's a useful description of the locomotives and the circumstances of their building in Steinbrenner's "Alco: a centennial history."
Their design was a sort of compromise between French and American practice: French enough for the user to cope with, American enough for the builders to design and build fast: they were needed immediately. As a compromise design, they weren't as thermodynamically efficient as the later French steam locomotives, but they had American virtues of sturdiness and maintenability: 141 R were among the last steam locomotives to be used in regular service by SNCF, around the beginning of the 1970's. I don't know how many were preserved, but there's bound to be at least one in the French national railway museum (in Mulhouse, near Strasbourg).