Thanks for the info Midlife. Do you know what tubing they were using?
Here is a 1973 Falcon, typical lugs and zero braze ons.
https://www.flickr.com/photos/65214324@N02/sets/72157647557844981/
This is a 1980 pro (I think) which is similar to the Argos one with proper decals
http://bikecult.com/works/archive/03bicycles/falconRB.html
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