20 Dollars

The Ontario Bank was a mid-sized Canadian chartered bank operating out of Oshawa, and its note-issuing history is modest enough that survivors from any denomination attract serious collector attention. The 1888 series was produced by the American Bank Note Company in New York — routine practice for Canadian chartered banks of the period, most of which lacked domestic security printing infrastructure capable of meeting their needs.

The bank collapsed in 1906 following a fraud scandal involving its general manager, after which outstanding notes were redeemed through the Canadian government's circulation fund. Unredeemed examples were not numerous to begin with at the $20 level, where commercial rather than retail use dominated.