3alarmer 

...these are just impressions, a I am not familiar with your particular Falcon frame. And indeed, the Falcon name, itself, had several iterations.

I do not recognize the lugs, but the fork ends seem older than 70's to me, and certainly the slack seat tube angle speaks to an earlier date of manufacture. This would be in keeping with the rear dropouts lacking an integral hanger. It's an interesting frame, and probably if juvela drops in, he will have something to say about the lugs and other frame fittings. Those pump pegs on the top tube, no braze on bottle cage fittings, etc. I think it might be a little older than you have estimated.

Otherwise, I'm no help. All the Falcon bikes I've seen in person are different from yours.