Sorry to bump this old thread, but I do have new information, if that will help. I stripped the frame yesterday of paint, found what looked like silver paint between the red and the steel - but still no identifying marks. The discovered silver paint was only on certain areas. The fork has the word: NERVOR stamped into the metal, and the head tube has "BOM" stamped into it. There is no serial number on the bike.

does anyone have anything better than a guess? or even more guesses so I can GIS the brands and try and compare?