Costa Rica Stamps ×4 + FREE Shipping within Australia 🇦🇺. Combined International shipping available. Mint Hinged, full gum, suitably aged. 1923 1 Centimo '1st Pan-American Postal Congress' + 1937 2 Centimos 'National Exposition San Jose' + 1938 1 Centimo 'National Exposition San Jose' + 1938 3 Centimos 'National Exposition San Jose'. 4 stamps in total. Photos form part of description. The stamps pictured are the stamps that you will receive.