When I was wondering around the UK using a Brit Rail pass visiting frame builders looking for a place to learn in the early 70's, I was surprised at how many builders their actually were. There was a lot. Usually comments on these subject threads in C&V only mention the biggest and best known brands when in fact there is a much bigger pool to choose from. What is distinctive about this unknown path racer is the scallop in the wrap around seat stay treatment. I've never seen that anywhere before. It is possible that builder's work never reached the US and only a British member can identify who made it. Is it safe to assume GMull that this frame is located in the UK?