Nicholas I - 5 Roubles 1854. SPB AT. MS-60 (Uncirculated - Typical Mintstate) Certified by NGC. Full of original mint luster. Very Rare in mintstate (less than 10 known examples).
Gold Russian Coin
Our price: US$1,884.00
03/20/2018 Alt-coins Just About Done With Bear Market; Bitcoin, Larger Cryptos, Hoped to Be Next
Large-cap cryptos like Bitcoin have taken a lickin’ over the past few months, but based on a report from a well-respected Bitcoin player about alt-coins emerging from a bear market, the space is wholeheartedly hoping Bitcoin, and others are next.
03/20/2018 Privacy and Counterfeit Coins
In 2007 Alexander Shapovalov suggested an unusual coin-weighing problem for the sixth international Kolmogorov math tournament . A judge is presented with 80 coins that all look the same, knowing that there are either two or three fake coins among them.