the three XXX at the rear and on the side could potentially point to Three Cross Motorcycles in UK, who built some specials based on Laverda. It looks to have the OSCAM rims as used on the 1000 SFC. As Steve pointed out, the footrest-plates look similar to the RGS though. Looking at the line of the full-fairing below the tank, it could well be it has a special frame though. Maybe a Motodd MK V with Full fairing?!? Design looks a bit inspired by the Norton F1