CAYMAN ISLANDS 1917 'WAR STAMP' 1½d on 2½d deep blue, SG55Cayman Islands 1917 'WAR STAMP' 1d on 2d deep blue, type 16 surcharge, SG55. Fine fresh appearance mint example with original gum. Faintly yellowish gum as often the case, and one perforation with trace of toning on reverse, yet much above average for this very rare stamp. Only 420 were issued in error. The printers, De La Rue, recognised that the surcharge did not adequately obliterate the original face value and they were replaced with a more