Thank you all for your interesting and helpful replies.
Regorian, thanks for the link to the uniforms. Yes, George's uniform looks very similar to the one of the "second valve trombonist". Also, it says "The photographer was W. Russell of Albion, New York so we must assume this bandsman was also from somewhere near there. However Albion. is a small village in Orleans County, NY on the Erie Canal about half way between Rochester and Buffalo. It's more likely that his band came from one of those big cities centers."
Interestingly George lived Port Hope, Durham, on Lake Ontario, opposite Buffalo and Rochester. However, looking at the distances it's unlikely that he played for a band in Buffalo or Rochester.
SiGr, will go back to the originator of the picture to see it's possible to get a close up of the belt buckle.