Banco de Mexico - Direccion De Emision Fabrica De Billetes, 1989, DuraNote Polymer Advertising Note. Mexico, 20 Denomination, Partially printed face of undertints only on DuraNote POLYMER Paper, back fully printed in black and m/c underprint, back with engraving instruments and ornate designs, the face has a thin shiny coating almost as if it was laminated, AU, Printed by Banco De Mexico. Banco de Mexico - Direccion De Emision Fabrica De Billetes, 1989, DuraNote Polymer Advertising Note. Mexico, 20 Denomination, Partially printed face of undertints only on DuraNote POLYMER Paper, back fully printed in black and m/c underprint, back with engraving instruments and ornate designs, the face has a thin shiny coating almost as if it was laminated, AU, Printed by Banco De Mexico.