JIM......Great BL 460 Joss card.....and, I hope you are right that there will be more BL 460 cards discovered.
Since you mentioned BL 350. If my theory is valid regarding the availability of BL 460 cards relative to their other
existing (or not) T-brand backs, then there's a chance that I may find a Blue portrait Chase with a BL 460 back
to add to my Chase collection of 20 T-brands. I still need a CYCLE 460, DRUM (if it exists), and BL 460 (if it exists).
TED Z