2015 Sir Winston Churchill £20 Fine Silver BU Coin - Collectible UK Royal Mint: 15.71g, 27mm diameter, Obverse Designer - Ian Rank-Broadley FRBS; Reverse Designer - Etienne Millner. Brilliant Uncirculated, interesting toning on Reverse - turning a plum shade! The Obverse, when you are the owner of the coin, may or may not look like Gorbachev in certain lighting conditions. I am going to miss this little fella!