Villefranche-de-Rouergue is in the Aveyron department. The letter was mailed to Bordeaux.
From Google: "French towns named Villefranche—which translates to "Free City" or "Free Town" (Old French: villa franca)—are special because they were historically granted tax exemptions and privileges to encourage settlement and trade."
The letter is commercial.
This is the mailing firm.
The stamp is type I.
