DuraNote Predecessor Polymer Banknote Advertising Note Specimens. ND, ca.1980-90's, Uncut Block of 4 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 of light gray panels on right with either light blue or pink "100" security device. Choice to Gem Uncirculated condition. Scarce and attractive. DuraNote Predecessor Polymer Banknote Advertising Note Specimens. ND, ca.1980-90's, Uncut Block of 4 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 of light gray panels on right with either light blue or pink "100" security device. Choice to Gem Uncirculated condition. Scarce and attractive.