Interesting bike, wish I could tell you more...but Wavre is a French-speaking town in Belgium, and that shop probably gives the name "Vanco" to the bike and perhaps also sponsored a CX team...this looks to be a genuine CX frame intended for competition. The 26.8 seat post might tell us it's built with a straight-guage seat tube...the BB threading might determine if it was made in Italy or not. Obviously a builder with the initial "D", but who might that be: D'Allessandro, DeBernardi, DaVinci?