This cabinet card features two uniformed band members and their instruments, which according to my limited musical knowledge, are tubas. Note that the instruments have the written music attached via musical symbol clips. Hopefully, a visitor to this site can leave a comment explaining the significance of the design of the clips. The musicians are handsome men and appear very serious as they pose for their portrait. The pin on the band members cap has the letters “DCB”. The meaning of this abbreviation is unknown. The photographic studio that produced this image was W. F. Kilborn of Grand Island, Nebraska.
THE CABINET CARD GALLERY 
The smaller instrument is a baritone horn, and the larger is a euphonium. They are very similar instruments, both playing in the same range and using the same fingering. Both were popular with marching bands during the late 19th century, up to World War I. The tuba is of similar configuration, but is larger than either of these.
The Euphonium is the actually part of the Tuba family. I agree with the larger being a Euphonium. The second could possibly be a Tenor Horn rather than a Baritone. It looks too small to be a Baritone.
The musical symbol clips are actually marching lyres, which are still used today to hold the music, while musicians are marching.
I suspect that DCB stands for Dannebrog-Cairo-Boelus …. three villages near Grand Island which probably had a “community” band.