Garth talked about the aero and tear drop tubing.
I still have some boxes of 531 "speed stream" tubing waiting to be cut & stuck. As well as a very exotic 753 oval set (one of only about 12 ever drawn).
I do wonder if they will ever be built up. If any one ever fancies creating an 80s replica please drop me a line as I would love to see these tubes get used. (sorry no price, which is breaking list rules, but I do not expect there will be a rush of people wanting these. They would be prety much at cost prices)
Regards
Martin Coopland, Scotland, http://www.BatesBicycles.com