shelbyfv, the link to that auction is
http://cgi.ebay.com/ws/eBayISAPI.dll...fvi%3D1&_rdc=1
It's a lovely bike, but I believe it's a little newer than 1973. I don't think Campy made those brake calipers that early. The wheels are not original, either. I think those hubs are from later than 1973, too.
But it is worth buying anyway.
The guy's spelling and English are irritating. Why is writing correctly so hard? OK, I'm a hard-ass, but really.