well the signature looks real. but nadal doesnt usually place the rubber piece over his finishing tape on his grips (he just uses the finishing tape, you can see the babolat label on it)
and those strings don't look like duralast, theyre almost completely opaque, rather than transparent.
plus that grip is clean as a whistle, and VS overgrips get dirty in almost no time at all.
The search is on! POG Mids in 4 5/8!