SINGAPORE: 50 Dollars (9.8.1990) commemorative issue for the 25th Anniversary of the Board of Commissioners of Currency in red and purple on multicolor unpt. Silver hologram of Yusof bin Ishak at center on face. S/N: "A 162693". Inside holder by PMG "Gem Uncirculated 66 EPQ". (Pick 30) & (Spink BCCS B28a).