DuraNote Predecessor Polymer Banknote Advertising Note Specimens. ND, ca.1980-90's, Lot of 6 different polymer sample notes with different security elements added. All are 100 Denomination notes with oil platform on front and back with oil wagon being pulled by horses, Includes security elements with colorful and ornate designs, all with variations of maple leaf with various security features on the counterfoil margins. The notes were part of a project from Mobil Oil for testing petroleum based hydrocarbon polymer paper for printing banknotes. All are in Choice to Gem Uncirculated condition. Scarce and attractive. DuraNote Predecessor Polymer Banknote Advertising Note Specimens. ND, ca.1980-90's, Lot of 6 different polymer sample notes with different security elements added. All are 100 Denomination notes with oil platform on front and back with oil wagon being pulled by horses, Includes security elements with colorful and ornate designs, all with variations of maple leaf with various security features on the counterfoil margins. The notes were part of a project from Mobil Oil for testing petroleum based hydrocarbon polymer paper for printing banknotes. All are in Choice to Gem Uncirculated condition. Scarce and attractive.