That the firm marketing and branding the instrument would have their own artisans complete the voicing. Some 'stencil' instruments were sold to various companies 'unfinished' or 'semi-finished,' with the intent I surmise that many, perhaps most, of the French stencil marks in the 'Ds' such as DuPre, Duvall, Dumont, Deschamps, Durand, etcetera were in fact made by either Cabart or Malerne.
To the realm of 'stencil' brands - many mysteries, many surprises. I intend that the list be viewed as a 'rough guide' The list of 'stencil' instruments I have compiled includes instruments that were fettled by the company or artisan whose trademark appears on the instruments. Over the course of decades of collecting and trading oboes, oboes d'amore, and English horns, I have come across many 'stencil' instruments stamped with a 'trademark' other than the stamp of the actual maker. USPS WILL NOT DELIVER TO OUR PHYSICAL ADDRESS Monday - Saturday, Pacific visits to try instruments welcome.