With due respect, this has nothing to do with a Robust.
It is a typical trade gun which were very common between the wars.
The Robust has sleeved barrels, a different third grip, a different forend attachment, no side clips and on and on. It would be marked either Costo or Robust, and the barrel flat markings would be quite different.
This gun looks like an "Helice" to me but one would need to see the breech face to know better. It's impossible to know who made it.
It was proved finished indeed, which is not too common.
It's a good looking gun however, and very typical.
Best regards,
WC
