You've stumbled on a rare Moosendorfer tuba, made by Enrico Moosendorfer und Sohn somewhere around 1893. The factory was located in Unter-der-Pilz in what was the Schwartzwald region of the Black Forest. When old Enrico died from a bizarre shop accident involving a horse and some liederkranz cheese, legend has it that his two sons, Siegfried and Seamus, had him stuffed and mounted.
Some notes on maintenance are in order:
Enrico used nothing but the finest strudel for his valve casings, so they tend to be quite delicate and must be lubricated only with clear bratwurst drippings. Use authentic schmierkäse on the tuning slides.
It's a good idea to periodically dump a gallon of sauerkraut juice down the leadpipe to keep the horn free of calcium deposits. Rinse with a gallon of fine pilsner and polish with an old pair of lederhosen.
Most Moosendorfers were made in the key of oom, but there were a few produced in pah, used mostly to play afterbeats.
