This bike came in my shop today for a tuneup... I never heard of it!
http://www.classicrendezvous.com/
Columbus tubing, vertical Campag dropouts, odd fastback binder bolt system, odd filet brazed fork crown, newer components (I think) than frame, looks early to mid 1970s.. Many parts are 1981-ish (rear der. so marked)
Dale Brown, Greensboro, NC USA