Sumatra, Proof Pattern 2-Keping, 1787, arms, date below, weight 6.50g, rev. value in Arabic script, date(AH1200) below, all witin border of projecting rays, grained edge,(Pr-28), NGC PF 65BN, NGC Cert #5984209-004. Extremely rare. With copy of original lot description from 1995, including: "Provenance: Spink & Son Ltd. purchased 1979." Pedigree: Purchased from Spink Singapore, Auction #1119, 24 June 1995. SC 670 Barrett, Purch 9506C.。