Lot 82Commonwealth Postal History - 1978 cover sent airmail to Finland with single franking Trees 45c Cootamundra Wattle tied €˜MAIL CENTRE ARTARMON/23JUN/1978/NSW 2064€™ machine cancel paying Zone 5 airmail letter rate. [The 'Trees' stamps were issued on 1 June 1978 and had only a short period of usage before the rate increases on 1 July 1978 - including the Zone 5 rate increasing to 55c for the first 10g  €“ made them largely obsolete]