Voila les réponses, faut plus de photos de tous les details (notamment le pontet) (et ne mets pas de photos d'autre velos pour eviter des confusions)
Hi! Z1556 was produced at the turn of 1984/1985 (and no Turbo saddles from 1986 will change anything here
P - EMC employee designation (usually placed at strange angles so that it will not be wrong with an imprecisely knocked out R); 9 - frame size: 59 or 49. At that time, EMC produced the following models: 3-Athlete, Eddy Merckx (Professional), Pro SLX (maybe also in version 753). The 3-Athlete model had a chainbridge and a smooth BB cover - it falls off; EM (Professional) was already produced in its latest version, that is, without the chainbridge and the BB cover "factory" adapted to guide the cables underneath, no indication R = Columbus SL / SP - fits everything; Pro SLX or 753 - the fragment of the frame shown in the picture also matches it (not all SLX were marked X!). 1) check the inside of the steering tube: smooth = Pro 753 (!), 5 rifles = Columbus 2) check the inside of the 4 tubes entering the BB cover: smooth = Eddy Merckx (Professional - late version), 5 rifles = Pro SLX (! - very early ).
Hi! it would be useful to take pictures of the brake bridge (the frame shown may also be Pista - they did not have any separate markings, just like CX, Chrono, ladies' bikes); the Z1551 looks 99% on Eddy Merckx (Professional) - they all had a Gipiemme break bridge; only 1 Pro SLX / 753 series had such bridges, later Silva bridges were used (moreover, in 3 different varieties)