CANADA. Bank of Canada. 1 Dollar, 1937. BC-21cs. Specimen. PCGS GSG Gem Uncirculated 66 OPQ.(BC-21S-ii) Specimen. This note starts a denomination set of specimens we are offering for the 1937 issue and the example here retains strong original paper and free of any hint of circulation.PCGS GSG Gem Uncirculated 66 OPQ.