Home / Stamps / Australia & Territories / George V / Kingsford Smith – Airmail OS Kingsford Smith – Airmail OSPrice: $45.00 1931 Kingsford Smith’s Flights Air Mail overprinted OS. SG 139a Fine Used Out of stock SKU: 100045 Categories: George V, Stamps Specifications Value Appraisal Product Features Additional Products 70th Anniversary Declaration $5.00 BUY NOW 3d Kookaburra $8.00 BUY NOW Tristan da Cunha 2004 Merchant Ships SG 805/10 Mint Unhinged $11.00 BUY NOW 49th Anniversary Declaration $9.00 BUY NOW