Jammerson could with have played a brand new Rick with worn round wounds and it would have sounded like him.
(...)
Define "Sounded Like Him"
I disagree. He would still be and sound like one of the most gifted not just bass-player, but musician of the last century.
This said: If you don't have a clue about bass playing or are 1000000000 million miles away from Jamerson's talent and you plug a string on a P with 110 Labella Flatwounds, it immediately has this Jameson sound.
If Jamerson just plugs an open string on a Rick with worn round wounds: noone would thing: Oh that must be Jamerson.
Feel and musicality aren't sound and the other way round.