Extension of low rate of postage to Western Australia, 1855-01-11 Unit ID: 86/109-12 Date: 1855-01-11
Extension of money order system to Victoria and Western Australia, 1862-01-06 Unit ID: 112/33 Date: 1862-01-06
Extension of parcel post to Caroline, Mariana and Marshall Islands, 1900-10-06 Unit ID: 200/362-63 Date: 1900-10-06