Possibly early 1900’s or late 1800’s Classical Trombone Mouthpiece
I actually rescued this mouthpiece from a pile that were going to be scrapped, and boy what a find! A little polish and a great background shot for a future library is possibly born.
Some consultation with a more experienced individual points towards this mouthpiece being based on the sort of mouthpiece measurements one might find from the Classical period- large, relatively flat rim, smallish cup, somewhat sharp transition into backbore, small bore.
A close-up of the clockspring rotors of a German Althorn belonging to the author.
Brass instruments can get a little tricky to tell apart the further you go back, but a modern set of puzzles remains today in the families of the “more or less conical-bored” low and mid brass. Many people know well of the tuba (at least the BBb garden variety, not so much the half-dozen-odd if not more other kinds), and perhaps the Euphonium and the Baritone (although God help them tell the difference), but few can tell apart the plethora of German brasses. Exotic instruments like circular Eb Horns, Althorns, Tenorhorns (different from Tenor_Horns), Kaiser Tubas, Oval Baritones, Oval Euphoniums, Khulohorns, and so on and so on are commonplace throughout Germany. Let’s just say, any Organologist could find enough to write a thesis paper on!