Can you help to identify these frames, bikes or parts?

Any ideas on who may have built this frame? All I know is the frame is lugged using Mervex luggs and the dropouts are Binelli. The dropouts also have GP Design written on them.

Can you post a pic of the dropout? Nervex lugs were common on top tier models through the 50's and 60's. What threads has it got? If they're French then it could be a Peugeot (although the seat cluster looks wrong). It looks like it has been resprayed at some point in its life.