Juvela,
Great info, thanks! I guess these manufacturers were`t so interested in consistency with their serial numbers. I don`t want to make an assumption that mine is a Urago if I`ll never really know for sure.
So for now, it`s "a French bike from the 50`s".
When I do the repaint I`ll put a French crest decal on the seat tube and head tube in honor of that.
I`m having a new fork made for this frame and will keep the old one. The fork will be wired internally for a Son SL hub and will have an increased rake.
I`m going to build it up with a combo of new and vintage components where each applies, the new ones in keeping with the 50`s style of the frame.
I will post photos as it moves along for anybody whose interested.