This really neat, GB, Victoria, 1d (SG43/Z15 Plate 175) issue was used at the British Post Office in Arroyo, Puerto Rico, between 1872-1877! It's in fine condition, with one, pulled perf at the bottom, a small crease in its top, left corner, and a hinge remnant. A nice, small, barred-numeral, "F83," cancel(75-80% complete) was applied! GB stamps used abroad from Arroyo, Puerto Rico, are very hard to come by! A very similar stamp is currently being offered online for quite a bit more.