I'm pretty sure I have seen Beaugniers (on the internet, not in person) that are labeled "Beaugnier" as the brand name. I'd say this C melody is like that - I think the model is "Special Perfect". Of course if another brand name is somewhere else, I'll be wrong, but with "Special Perfect" engraved real big and then E. Beaugnier" right below it, it sure looks to ME like that is the complete brand and model designation.I believe Beaugnier only made stencils, or as part of an order from some distributor or music store . I don’t think they sold directly.
The ones I have seen with a Beaugnier label also have a music store name engraved on them somewhere. My alto Model 38 has “Javalier Dijon” engraved near the Beaugnier stamp. @jcn664 does your C-melody have a store name on it?
So, yes, almost always made FOR someone else, but not 100% of the time.
