Unusual deal

Today I bought a very intresting frame, when buying I didn't know what its brand is, I just saw that is fillet brazed and looked quite old.

No info on this particular builder on the web but I have found
the shop in Belgium that the frame was probably made by.
http://www.tweewielersdebondt.be/overons.html

I have send them an email asking about it, we'll see what happens...