Sumatra, Proof Pattern 2-Kepings, 1787, oval 23mm x 27mm, weight 7.28g, oval, plain edge, shield on projecting rays, flowers either side of date below, all within tressure of arcs, rev. value in Arabic script, date (AH 1200) below, all within border of projecting rays and tressure of arcs, plain edge,(Pr-31a), NGC AU 50BN, NGC Cert #5984209-005. Extremely rare. Pedigree: Purchased from Spink Singapore, Auction #1119, 24 June 1995, Lot 129. Extremely Fine, plain edge. With the original 1982 Pridmore sale envelope by Baldwin s. [?] Together with Pridmore s original ticket stating "Pr.31(a)". [?] Provenance: Spink & Son (purchased 1971). SC 674 Barrett, Purch 9506C.。