Looks like it says BUFFAIRO, not BUFFALO.
http://www.woodenpropeller.com/clas19.htmlThe usage of this large, wide bladed propeller is unknown, but the hub dimensions are consistent with an OX5 sized hub. It is likely that it was used on some form of flying boat in the late teens. Little is known about the Buffalo Aeroplane Corporation, but another propeller manufactured by them can be found here. This propeller is in good original condition with good decals, although they are dark in subdued lighting conditions.
http://woodenpropeller.com/Curtiss_F_Boat.htmlComments: Built by the Buffalo Aeroplane Corporation (Buffairo), this propeller was sold as surplus by the Navy in 1920. It was used on the Curtiss model F flying boat, designed in 1913 to 1914 and ordered by the Navy around 1916. Using an OXX-3 engine necessitates the Left Hand rotation to make it a pusher prop.
Not sure that is the exact prop you have, but at least something related.