Looks tidy! Worth remembering tgat they also made one-off custom frames in those days as well as Claude Butlers, so it's often hard to know what you have!
It's not a 'Professional' that's for sure - wrong seat stays and tubing. It looks like Campagnolo running gear?
What are the hubs and wheel rims?
Close-up of the wheel droputs would be helpful.
http://nkilgariff.com/Models.htm