This coin has been in my collection for 10 years. It was first struck as a Swedish 1 öre SM 1746 and then overstruck in Russia as a 1 Kopek 1758. They are in a very nice book about older Russian errors and overstrikes by two Norwegian numismatists Bernhard F Brekke and Tom Willy Bakken. In this book they list 4 known such Russian-Swedish overstrikes and the show pictures of two of these. The coins in the book and my coin in quite poor condition, but none of them display the year from the first striking of the Swedish coins. I have asked myself how these overstrikings were possible. One theory is that the Swedish coin was sold together with other metal as junk to the Russians. I found this coin in the United States at a Russian coin dealer in Chicago at a reasonable price. I guess today's high interest in Russia (coins, art, jewelry) made it a good finding.
The Copper Coinage of Russia, Imperial Russia 1700-1917 Supplement 1997 (errors, overstrikes and fakes) by B.F Brekke and T. W. Bakken