Central Bank of Oman, specimen 10 Rials, 1993, serial number B/5 000000, red SPECIMEN overprint and De La Rue seals, one cancellation hole, specimen number 3, printers annotations and date 21-9-92 in top margin, in PMG holder 50 EPQ, about uncirculated, rare
BNB B216bs, Pick 28bs £1,000-£1,500