Thanks Breanna72 for the compliment!
A week later after the find of 1937 $2 banknote, I went to the same bank branch between X-mas and New Years Eve and, it appears that Santa Claus was there. I received the following banknotes which included 3 1954 banknotes where the $5 banknote with the A/S prefix was the start of the 2nd range for the $5 banknotes after first range of prefixes of A/C to Z/C (including the Devil's Face notes) was completed. Based on the Charlton Catalogue, this $5 note was probably issued sometime in the calendar year of 1962 as the Rasminsky become Governor, Bank of Canada in 1961. No doubt, this note was sitting around for quite some time.
More interesting, the 1954 $1 banknote with the prefix Z/Z was at the end of range of 2 letter prefixes for all banknotes being issued by the Bank of Canada. I can recall back in 1970, that there was speculation that multicoloured $1 banknote would make its debut as the multicoloured $20 banknotes were starting to appear in great abundance in 1970. The first of the multicoloured $20 banknotes started with the prefix EA which is consistent with the BoC practice. However, the Bank of Canada fooled us by starting the prefix of A/F for the 1954 $1 notes and then A/I which is interesting as the standard practice of the Bank of Canada was to use a low alphabet letter for the start of a new series of banknotes.
For example, A for $1, B for $2, C for $5, D for $10, E for $20, H for $50, J for $100 and lastly K for the $1000 banknote as this was the standard for starting a new series of banknotes for the 1937. 1954 issues and for the multicoloured series. The letters F, G and I were skipped and became dormant. Does anyone know how the Bank of Canada decided this?
This type of sequencing continued but became slightly modified with the introduction of 3 letter prefixes during the multicoloured series. Even with the polymer series, there is a continuation of this concept where for example, the second letter of the prefix for the $50 and $100 banknotes still use the letters H and J, respectively.
Lastly, I should mention that there were some Bird $2 and $5 banknotes for the taking. I always find the Bird series to be the most attractive Bank of Canada banknotes ever issued.
Anyways, enjoy the pictures and please comment if you have any further insight into the sequencing of prefixes.
Best regards, Whitenite