Category: 1931 SIXPENCE AIRMAIL
OVERPRINTED 'OS': Covers 1) 1931 airmail registered to London with 6d x3 (one without overprint) & numerous instructional handstamps; 2) 1932 airmail to King Island with 6d & KGV 2d; and 3) 1930s parcel label with 6d & Roos 2/- maroon (Third Wmk ?). Scarce trio.
Official Stamps , overprinted stamps , C of A Kangaroo Issues , parcel post , Registered Mail & Registration Labels , Postal History , Aviators - Sir Charles Kingsford Smith , maps , Transport - aeroplanes , C of A Other Pre-Decimals , AUSTRALIA