This really neat, vermilion, GB Victoria, 1873-1880, 4p., Plate-15 issue was used at the British Post Office in Carthagena, Colombia, between 1873-1880! It's in fine/very fine condition! A nice(but heavy), partial, "C65," cancel(75-80% complete) was applied! GB Victoria used in Carthagena, Colombia, especially with the erroneously-supplied, "C65," bar numeral killer, are not seen much!