I'm watching this Film in English class. In the film, somewhere around the middle after Algernon heads into town at night, there's a short scene with a dixieland-style band. There is a prominently-shown tubist with what looked like a compensating BBb Besson, silver plated. Unfortunately it's just an actor behind the tuba, made evident by wrong fingerings that weren't in time with the music, but still a neat sight.

I don't have a screenshot from the movie, but the tuba looked something like this one (of course it was probably much older, to fit the early 1900's setting in the film)