I'm researching a CDV I bought this past summer and am having great difficulty finding what type of uniform this is. I have it narrowed down to a French military uniform, likely post 1900. I was able to find two other examples of the same uniform on different men (with different identifiers on the collar of each), but they exist on a stock photo website, so they contain no additional information. Stock Photo 1 Stock Photo 2
Can anyone tell me what type of uniform this is, the likely year(s), and any other information?