Originally Posted by P!N20

Unfortunately Pinarello serial numbers don't tell you much - more on that later.

The fork crown is the older style indicating around 1985 or earlier. Seat tube bottle mounts started appearing around 1985, so I think mid 80's is a fair guess at the production date. There are no GPT logos on the seat stay caps, so looking at the 1985 catalog the Catena Lusso and Triathlon Victory fit the description. If we think the cranks are original being Campy Victory, then Triathlon Victory it is. Of course, we don't know if the cranks are original or not.

What's odd is frame pump mounts didn't really start appearing on Pinarellos until 1997 1987, but maybe they could be ordered with them. For a mid 80's Pinarello I'd expect to see a serial number XX### (X=letters, #=numbers) but yours is X##. It's closer to the early 80's serial number format X### - so it might be earlier than I'm guessing. But looking at the 1981 catalog the models with blank seat stay caps don't have front derailleur tabs, sooooo...I don't know, but I'm sticking with mid 80's Triathlon Victory.