i can more or less confirm that those are unoriginal. the pots should have no brand markings on them at all. no writing around the sides. and have a circular creater on the base, with lettering written round the edge in a circle. these are '65 mustang pots, but jaguar got the same ones, only different values:
http://fenderjaguar.net/images/65pots.jpg
the pre '64 pots had the markings on the sides, like these:
http://www.fenderjaguar.net/images/remakes/pots2.jpg
http://www.fenderjaguar.net/images/remakes/pots.jpg