It's a bear!
St. Louis Symphony Programs:
These came to me along with a large-bore Olds Standard that apparently belonged to Frank Henniger, a freelance trombonist in the St. Louis area in the early 1900's. I do not know if Mr. Henniger performed at these concerts, but other documents that came with the horn indicate that he did sub with the orchestra on a regular basis.
December 26, 1907
December 27, 1908
December 26, 1909

The Jerry Rosa Collection
Jerome "Jerry" Rosa (aka "Happy" Rosa) was a professional trombonist, starting out with the big bands in the late 1930's and eventually moving to the LA studios. When I acquired two of his horns from his nephew, he gave me a collection of photographs and other items from his career.