Central Bank of Oman, specimen 20 Rials, 1987, serial number B/1 000000, red SPECIMEN overprint and De La Rue seals, one cancellation hole, specimen number 4, very minor evidence of mounting, printers annotations and date 14-5-87 in top margin, in PMG holder 50, about uncirculated, very rare
BNB B217as, Pick 29as £1,000-£1,500