Buescher Epoch 3
Circa 1908 - 1909
A 2nd set of slides was included with this particular instrument - I believe this set was to switch between HIGH and LOW pitch. Each set of slides could be pulled out to a point to allow in "Bb" or "A" tuning
Notice the 2 lead pipes - someone put in the 2nd set for this picture.Excerpt from the 1909 Buescher Catalog