All but the commemorative $25 banknote began circulating on 11 March 1935, the same day that the Bank of Canada officially started operating. All banknotes contained the words "Ottawa, Issue of 1935" centrally at the top of the obverse, except for the $20 banknote, in which the words appeared below the serial number. This is the only Bank of Canada series that includes $25 and $500 banknotes, and the only series that includes the official seal of the Bank of Canada. The $500 banknote was a "carry-over from Dominion of Canada bank notes", and is the only Bank of Canada banknote series to include this denomination.