Hi,
Since I cannot currently post photos, here is a method that might help. Please see page 16, post number 400 of this thread. This blue frame is an exact match (paint wise) to my frame of inquiry. Mine is white (main color) and uses blue and burgundy decals. Compared to the blue one, mine does not have the braze-on for a front derailleur. The decal at the base of the seat tube is a Columbus Custom Genius decal (silver and blue) with a border that says Eddy Merckx at the bottom and Columbus at the top. The decal at the top of the seat tube has the Eddy Merckx logo then says "Original paintwork Eddy Merckx Zinc Phosphate Anti Corrosion Treatment" Does this mean that the frame was repainted at the factory? The underside of the bottom bracket shell is much simpler than the blue one - no setup for internal cables, but a threaded hole for a plastic cable guide instead.
I hope that this helps with the identification process and I thank you for your efforts and time.