Woah, cool frame! How about some shots of the shell and dropouts?

First thing I thought of was Mercian, but then I realized that's because I facilitated a black-with-red-accents one for one of our fine, upstanding members in Canada a few years ago. Still, the stay caps say British or French to me.

Shell width/threading? Btw, the lugset looks like Bocama Competition 83 to these eyes.

DD