Its probably a BF. It could also be an Avery R with updated MM hydraulics. Quite a few were painted MM gold after the merger.
I am thinking the serial tag is on the top of the RH frame rail close to the footrest. If the serial number doesn't show up on the MM website, do a search for Tru-Draft Registry, they have the Avery serial numbers there.
P.S. The Grille is supposed to be MM Gold. I think they look better red myself though.