If this Ruth rppc was real, it would be worth A LOT. Cool Ruth image, early date, and probably most important... the Société Anonyme link.
However, as noted above, the reverse doesn't look good. The back looks stamped vs printed... compare it to the genuine Société Anonyme pc back and note the difference.
Also, no Société Anonyme credit anywhere on the front is not a good sign. Should at least have the S©A. Ideally would also have a photographer credit.
Wouldn't be surprised to see SGC slab one, they are pretty clueless when it comes to postcards.