This is probably a question for the French members out there:
I have always thought of the style of case construction used for Mittraileuse and Tabatiere rounds - cardboard or paper-and-foil riveted to a single-piece brass head via the primer pocket - as “Pottet” style cases. That was what a knowledgeable collector told me, and I have called them that ever since. For examples, see Hoyem Vol. 2, pg 131-132 and 142-143.
However, in examining the French patents listed in Berkley Lewis’ book, “Small Arms and Ammunition in the United States Service, 1776-1865” (see pages 267-275) it seems this style of case construction has nothing to do with Pottet at all. The closest patent listed is No. 12603 by Gevelot (1855), which covers a “paper tube and reinforce, metallic base cup. A wad of wound paper surrounds priming pocket”
So, it would appear Gevelot - not Pottet - should be given credit for this. Which makes sense, because most of the Tabatiere rounds I’ve ever examined have a raised “G” on the primer.
Am I correct? How would Pottet have been involved in this? Was he part of Gevelot, or was he an independent gun-maker? If any of you European collectors can help, I would greatly appreciate it. My French is, unfortunately, limited to ordering a beer and calling a taxi.