Ok thanks everybody for the input and knowledge it's appreciated.
Wonderful pix of the era the bike was made and very much appreciated for sharing.
Realizing that one used lugs from what was available this could be certainly a plausible reason for the different ones i have seen on the 1st gen merck's.
Nevertheless the biggest question mark remains for me the lack of serial number info as this is by no means what i would call a normal way of doing as seen on the picture.
Just a number to indicate a frame size is doubtful in my eyes to introduce to customer frames, but that's me
So is the bracket pix the clue to if was or was not een regular handwriting dealer sold merckx or not.
Also there is no decal on the tubing being used and i'm sure that that was part of buying a merckx as i'm sure it was top tubing being used so it's not logical there is none on the bike as all the decals are in very fine condition.
