Russia
U.S.S.R. silver Pattern 50 Kopecks 1924 London Mint, by G. Kruger Gray, Plain Edge, struck at the Royal Mint London, Kaim page 140, Proof 63 NGC. Obv. Worker and anvil. Rev. National arms. Boldly struck with subdued mirrored fields beneath the rather heavy silver-gray obverse toning and reddish-gray reverse toning. For accuracy we must mention a tiny rim bump at 3 o'clock on the obverse. An extremely rare Pattern issue. The only other example we have seen was sold in January of 2007 by Dmitry Markov, Lot 1379, Ex: Goodman and Ex: Hesselgesser. It was certified Proof 62 by NGC and sold for $17,000.
Estimate: 30000-35000 USD