CANADA. Bank of Canada. 20 Dollars, 1991. BC-58bexp. Experimental. PMG Choice Uncirculated 64 EPQ.Bonin-Thiessen signature combination. A fully printed example of BC-58b but printed on polymer. One of the Banks earliest experiments with their notes printed on non-paper. A few different varieties exist of this type believed to have been printed on Duranote substrate. True experimental pieces, examples are rare, and only recently more of these have appeared on the market. This example is original with the typical specimen perforation seen on these. With the popularity of polymer-printed notes we should expect to see spirited bidding on this piece.