Did yours have US Royal Riders? Those were of the period, but I thought the balloon Jaguars came with Schwinn "Monsoon" tires. But you don't see many of those either.
There's no registry, but there's some good information in this thread:
Ok lets see if anybody can help with this. I have a couple of 53/54 Jaguars, both have both types of fender mounts in the rear factory, I have seen 4 (owned 3 of these) over 30 yrs., first I bought a 53 cantilever frame I thought someone had welded a hand brake hoop over the og fender bracket...
thecabe.com
It would be interesting to see how many of these there actually are, but nobody's put in the time to start a registry and keep it updated. Maybe when I retire.