Official Australia Post Postal Numismatic Cover issued 2015 (Issue 18) commemorating Queen Elizabeth II becoming the longest-reigning British monarch on 9 September 2015. Features gold-toned EIIR medallion, two 70c portrait stamps cancelled First Day of Issue 9 September 2015 at Elizabeth SA 5112, and reverse $1 coin window (ELIZABETH II AUSTRALIA 2015). Limited to 9,000. Design Sonia Young, Australia Post Design Studio. Authentic Australia Post Merchandise. Printed RRP $15.95 visible on reverse.
