imo, the jury's out on a repaint-

The first that I recall that the model name decalling was shown on the top tube was approx. 1985, concurrent with the introduction of the Montello.

I am also of the belief that it's most likely a Record Equipe/Special but I'm voting for an late 84 original manufacture date.

Dating Italian bikes, esp by small volume manufacturers (as Pinarello was in the 80's) isn't ever going to be an exact science.

Precise model year delineations don't generally exist at all but rather a new model will see introduction at most any time during the year and construction /cosmetic details will often vary from frame to frame and batch to batch as the builder sees fit, with distributor demands, and with subcomponent parts availability and supplier costs.

Any given model will then gradually ,steadily and sometimes sporadically evolve over time, often even taking on a different position within the product line over the course of its production span .
Even decalling and model designations for the same bike can sometimes change within the same model year.

IMO, the best that you can do is unearth a preponderance of frame details and determine their associated timelines to make a calculated, educated assement of any given frameset that hasn't been firmly documented.

Even then , frames and bikes were commonly held over in inventory thru the calendar year before purchase & delivery to the original owner.
Also, a few major importers typically brought in their framesets bare & unpainted, (sometimes not even affixed with braze-ons and chrome details) and would have them detailed, finished & outfitted in-house.
Such a frame might have had a mixture of details and decalling spanning a year or more and sold as current inventory.