Naudet et Cie
Naudet et Cie began operating in Paris in 1860. The logo used on their instruments is PNHB, which represents the last names of their four founders Pertuis, Hulot, Bourgeois, and Naudet. They were still operating after WWII and into the 1980s.
An 1891 Naudet et Cie aneroid barometer catalog is available here (17 pages):
