From Pipes, Artisans and Trademarks, by José Manuel Lopes'
The Oppenheimer Group was a British holding company, which through the Cadogan company had various pipe brands. It was founded in 1860 by Charles Oppenheimer, along with brothers Adolphe and David, and Charles's brother-in-law, Louis Adler. They established connections with GBD in 1870.
With business interests in Saint-Claude, Oppenheimer bought the Marechal Ruchon & Cie. factory, which from then on had two directors in London (Adolphe Oppenheimer and James Adler, son of Louis Adler), and two in Paris (August Marécel and Ferdinand Ruchon).
The following brands, at least at one point during their history, belonged to the Oppenheimer Pipe Group:
- Dr. Plumb
- City de Luxe
- Peter Piper
- Silver Dart
When researching any of these pipe brands, or the Oppenheimer Pipe Group, you may want to explore this fantastic contribution: Wonderful Circa 1950 GBD featured Oppenheimer Pipes Catalog, courtesy Václav Blahovec