1973 EXPLORERS 3p SG 406-407. 1973 PAINTING 3p SG 931. 1973 PAINTING 7 1/2p 993. Be sure to add me to your. Our aim is TO BE THE CHEAPEST and the BEST... However mistakes can happen, if we make a mistake, let us know, we will sort it out!! This item is in the category "Stamps\Great Britain\Sheets". The seller is "dolf10" and is located in this country: GB. This item can be shipped worldwide.