1497 1888 Centennial 2d black Emu imperf DIE PROOF on no wmk paper, also used for postal stationery envelopes. Superb UN, 4 margins. SG 254(p). Extremely rare (P) $300 $450
1498 1888 OS opt Centennial 1d to 1/- opt Specimen. F-VFM, 2d small stains. SG O39s-44s cat £225 (P) $150 $200
1500 1890-95 "OS" opt Carrington 20/-, perf 12, wmk "5/-" sideways, from 1895 special printing for PO sets. VFU/CTO, ovals cancel. SG O48(var) cat £850. Rare as only 158 sold. (P) $600 $800
1501 1890-95 "OS" opt on Carrington 20/-, perf 10, wmk "20/-". VFU/CTO, from the 1895 special printing for PO sets. SG O50 cat £650. Rare as only 148 sold. (P) $600 $800
