Russia Russian USSR 15 Kopeks 1991 Overstruck UNIQUE. Compare with regular coin on the pictures - larger diameter and smaller thickness. The item "Russia Russian USSR 15 Kopeks 1991 Overstruck UNIQUE" is in sale since Sunday, April 27, 2014. This item is in the category "Coins & Paper Money\Coins\ World\Europe\Russia\USSR (1917-91)".The seller is "michaelp42" and is located in Tallinn. This item can be shipped worldwide.