French perfume bottle

Hello, I have a French perfume bottle where there is “Minerve casquée I” in 950 silver and also a tiny hallmark of the silverware where I could only see it with an electron microscope, but this brand is a symbol with a G.T. below it. Does anyone know this silversmith, please?

I couldn’t find images of the contrasts on these silverware, but based on the description of the hallmark, I imagine it to be a tea leaf and therefore made by Thévenin, Georges, what do you think?

Thanks for help