French 36 inch metal sign

Hello, I'm a newcomer to Coca Cola memorabilia.
I've purchased about a year ago this old metal tin sign, quite heavy. Size is a bout 36 inches x 36 inches. It is surely french as it shows Marque déposée. Colors have faded a bit, and shows signs of rust and dirt, but is quite good looking and striking to me. Does anyone have a clue when it is from (my guess would be sixties)? Is this type of sign a nice collectible for you the connoisseurs (any idea of the value maybe)? I really like it and plan to hang it in my living room and enjoy it, even though I'm mainly attracted to movie posters and political protest ones... It's a change. Regards from Paris, France.