Specialist in world coins and banknotes. Narrow specialization Soviet Union (1921-1992) coins. Attends numismatics conferences (1994 the USSR; 2013 the USSR), coin dealers shows (1995, Atlanta, GA, 2009-present Numizmata, Denmark, Finland). Conducted coin auctions. Develops site on varieties of euro coins http://eucoins.byethost9.com/, if you have questions feel free to ask prokophyev@yahoo.com