Reproducing decals without original masters gets pretty complicated when the only reference one might have are originals that are barely there and flaking off a frame. Worse yet, they are wrapped around frame tubes which makes it hard to get a most accurate measurement of.
I suspect that's why a lot of reproductions just get "within the ballpark" of being accurate to the original graphics at best.
What also does not help with 80's Pinarello is, the old decals tend to leave a permanent ghost on the paint where they flake off, so even if you apply nice, new repop decals on the bike, the ghost of the original might show past the edges of the new one.. So chances of doing a close to perfect decal resto could be a long shot.