That's fab! I want that water bottle!!
Very similar bike,never seen this image, i build mine from memory and catalogue pics.. mine is getting Campagnolo tan hoods already coming and a turbo or Rolls saddle next, it rides like a dream!
Why I think its a Mexico?
I know someone in Holland who has worked with bikes and teams since the 70's and owns some amazing famous raced bikes says it's a Mexico as well as a Administrator from the Moltocolnago group seems to think so but they could be wrong, dunno but although this frame has never been build before it has been re- sprayed in the past by the looks of it and foil super decals could have been added then and placed in current position, who knows , if you are in Edinburgh next week you are welcome to have a look