Just to add to the Rally chronology, there was also a limited number of second gen 3550 mech's released in '84 with Nuovo Record front plates.
I have a NOS one and assumed it was a 'bitsa' or maybe an off-the-books jobbie assembled from random parts by Campag employees (as was sometimes the case, apparently) but then I found one in a Japanese Campag catalogue. Seems they'd run short of Rally plates at the time so used the NR ones.
There's a few references to this version in the comments section here:
http://velobase.com/ViewComponent.aspx? ... 32b5ed3114