Part of a two-cover set issued exclusively at the ANDA Sydney Money Expo 2016 celebrating Queen Elizabeth II's 90th Birthday. This cover (724/750) features the 1998 Rank-Broadley Portrait 50c coin with dual $1 + $2.75 Golden Wattle stamps, postmarked GPO Sydney NSW 15 October 2016. The companion cover (725/750) features the 1966 Machin Portrait 20c coin with a $2.75 Golden Wattle stamp.
