Yes but there were quite a number of manufacturers who licensed the Merckx name in the 1970s or those who built for the Team or built Team replicas...

It would be a good idea to make a list – I'll start:

Falcon UK
Kessels Belgium
Kalkoff Germany
De Rosa Italy not normally numbered
Colnago Italy not normally numbered
Velo Sport Bologna Italy
Miyata? Japan
???? France