Here is a 53-cm example of the Merckx-labeled Falcons recently discussed on the list. This may be the "upscale" model given that the forks and stays are half chromed and the lugs look to be pretty nice longpoints.
I have the cheapie model with chunky, unthinned lugs, no chrome and no derailleur hanger on the right dropout. Note the seatstay attachment; not the wrapover commonly used on older Falcon frames. Might not be a bad rider if it is 531 straight gauge.
No connection, etc.