think it's a generic BB shell.
Here's another one for a start... http://static.lfgss.com/attachments/59804d1350596664-20121018_204244.jpg
Can't help with who may or may not have cast the lug but Swiss thread should narrow things down (no honest UK builder would have done such a thing..).
Have a look on flickr at Cilo and Zeus - both of them had Swiss BBs
I think you have something European* there
by European i mean suspicious and probably a bit effeminate
name of this shell is listed in I think 'help to identify the parts' thread somewhen not too long ago, starts with 'M'
name of this shell is listed in I think 'help to identify the parts' thread somewhen not too long ago, starts with 'M'
glad I could help