Hello World Rail Fans!
I would like to know about the SNCF monograms. I guess that in era 2, there was a circular monogram pre-dating the lozenge, maybe pre-dating the all-letters immatriculation on the left end of the passenger cars. The circular monogram was on the side of the passenger car, but in the center. It was on the car the first time I ever rode on the SNCF. The cars were all green, with black roofs, I think. The monogram was painted on in an orange gold color.
It's a simple enough question, but I don't know anywhere else I can ask it!