forgery was my thought as well given the sheer volume of the post
BobInRye, what was it that made you think they were forgeries? If you knew they were forgeries, why do you need to ask?
For everyone else, the Poste Local and Rayon I were printed in sheets of 40, each position quite different. Therefore, you need images of both full sheets to confirm genuineness. Those do exist.
For the Poste Locale, one can suspect the heavy ribbon around the shield not being correct; it is actually made up of three lines. There are somewhat worn prints of the stamps, but nowhere does it appear in either "stamp" above that there are three lines. But the real key is matching up the background sqiggles to a genuine stamp. Both examples above fail that test, unfortunately.
For the Rayon I, no position has a "5" like the above. The background squiggles in the example above don't match any genuine stamp.
For the Genevas, an image from an expertised stamp from an auction catalog would work. The stamps from the genuine pair are different, so there's only two major types to deal with. In the genuine, the eagle is a solid black and differently shaped. The genuine key does not have two "K"s in the business end; it looks like a forger's signature if you ask me. There are many more differences.