What is my Pinarello model?
The frame seems suspicious: it clearly was TIG-welded, just look at those smooth tube joints and compare to 80s lugged frames, which means the MY should be at least in mid 90s. The Dyna looks very similar, but the the dropouts don't match (holes vs no holes). Newer frames either have seatpost bolt inline with top tube or a modern collar, but the frame in question has the bolt at least a centimeter higher than the top of the top tube. The paint doesn't match the time period either, the most similar paint jobs date to 80s lugged frames, just like the head badge. I think it was repainted with the use of an aftermarket decals set.

I'd look for any branding cues in every crook and nanny and ask the previous owner about the model and paint job.