, 1d "July 1889" ), all overprinted "SPECIMEN" (Type D12). A few perf faults. S.G. 20, 21, 23" /> Specimen 1885-96 ½d., 1d. and 6d., each affixed to small piece and showing date mark above in ink (½d., 6d.<I> "May 15 - 86" </I>, 1d<I> "July 1889" </I>), all overprinted "SPECIMEN" (Type D12). A few perf faults. S.G. 20, 21, 23 | Christie's