You can tell it is a French postcard because it stays "Carte Postale" on it which is French for "post card".
(for anyone searching for "french postcard" wanting to see erotic naked photographs of women then here is the front of the card).
labeled "J. Mandel 273 A-N"
(as a reminder of the inevitable human mortality I'll point out the model is probably dead. If she isn't then by now she is, to be kind, vintage – to be unkind she is ancient, decrepit, creased, wrinkled, robbed of many of her charms by age and gravity and probably looks like a she was made of wax and kept too close to a flame with her bounce and jiggle replaced with a sagging waddle.)
