Robbietunes generously passed this mystery frame onto me for a great price. It rides great! It corners great and Excells nicely.
I will take it on a nice hilly ride this weekend and see how it does on good climbs and descents.
The bare frame weighed (hanging digital scale) 4lbs 6oz and the frame and fork weighed 6lbs 4oz.
So the frame itself is pretty light. Still have no idea about its origins.
It seems the fork crown should be a big hint, it's fairly unique.
The wheel base is very tight on this thing. It is a struggle to remove the back wheel with the tire inflated.
Here it is built up with mainly Dura Ace 7400.
It tipped the scales as shown with wire bead tires and an extremely heavy seatpost at 21lbs 6oz.
I will put a nicer 27.2 seatpost as soon as I come across one.