Australian Duck Stamp Expo souvenir sheet/entrance ticket, a joint US-Australia issue, $15 King Eiders & $8 Pacific Black Ducks, VF NH (Image)

Est. 40

1932, Air mail cover from Melbourne 25 May 32, to New Mexico, franked w/2p red & 3p green Ci, with added 5d Papua at left side not tied, label stuck to back from Postmaster General's Department stating "It is regretted that the provisions of the Postal Convention do not permit of the desired indirect routing of this article," ??? (Image)

Est. 30