The "G" sign next to the "Charron" sign, was what solved it for me. It looked like the Paris Salon, and the puzzle car looked like a Labourdette Skiff, meaning it was 1912 or later. An image search for "Paris Salon 1912" provided your above "Gobron" image.
If you look closely at the currently showing, restored G-B by Rothschild, you can see it may be the same car. Behind the side-mount spare, is the small circle on the front part of the boat section of the puzzle car. I also found an indication, that the fenders/running boards were remodeled during the 1920's, leading to the current look.