coins minted in 1986 and another 15 coins in 1988. The same amount of ten-ounce platinum coins were also released in 1986 and 1988. The 2017 and 2018 silver coins came in both proof and reverse proof versions. The following table shows mintages of proof coins unless noted with a (b). NR - Mintage numbers not released (b) - Brilliant uncirculated finish. Not a proof coin See also Angel (Manx coin) Bullion Bullion coin Gold as an investment Inflation hedge Noble (English coin) Platinum as an investment Silver as an investment References Birds on coins Ships on coins Bullion coins of the Isle of Man Gold bullion coins Silver bullion coins Platinum bullion coins Palladium bullion coins