I just google either and from their home page navigate their site. They also list varieties and other information Pretty coin
I used google and also tried navigating their pages. White coins show up but not BN. Maybe I’m doing it wrong.
This? https://www.pcgs.com/valueview/elizabeth-ii-1953-2022/1965-50c/4382?sn=171036&h=pop It’s a silver coin, so no RD/RB/BN…or did you mean something else by “BN”?
No designations for silver. The closest was the brief period in the early 2000s when NGC used “T” for toned or “W” for white but that quickly went away.
NGC is here (under "NGC Census") and scroll down to 1965. Make sure the PF button is selected - it seems like MS and PF are both the same url. Looks like they designate PL, PLCA and PLUC. https://www.ngccoin.com/census/world/canada-to-1968/sc-67/50c/
By the way, ANACS has also graded these. You'll need a login to see their pop report. It's rather tedious to get there for their non-US coins. Here's a screenshot.
