Judging by the details of the engraving on yours which are more crude than a real one I believe that the one you have is a fake as well, here's a real one so you can compare the details, if you go to the link all of the text will be in Russian, I'm hoping that the text I copied will be in English. my web browser automatically translates such pages as this one, the accuracy of the translation I cannot confirm.
From what I read on another forum this coin is very rare and more often than not most are fake, the link below came from that forum.
Ìîíåòû è ìåäàëè. Êàòàëîã
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5 cents, coat of arms of the city of St. Petersburg | 51.19 | reticulated | |
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[TH="colspan: 9"][/TH]
[TH="bgcolor: #F1E4D2"]Year[/TH]
[TH="bgcolor: #F1E4D2"]Number[/TH]
[TH="bgcolor: #F1E4D2"]Description[/TH]
[TH="bgcolor: #F1E4D2"]Weight, g[/TH]
[TH="bgcolor: #F1E4D2"]Herd[/TH]
[TH="bgcolor: #F1E4D2"]Bridles.[/TH]
[TH="bgcolor: #F1E4D2"]Ilyin[/TH]
[TH="bgcolor: #F1E4D2"]Petrov[/TH]
[TD="class: metall, bgcolor: #F1E4D2, colspan: 9, align: left"]
copper coins
[/TD]
[TD="class: number, align: right"]
1757
[/TD]
[TD="class: number, align: right"]
14
[/TD]
[TD="class: katalog, align: center"][/TD]
[TD="class: katalog, align: center"][/TD]
[TD="colspan: 9, align: left"][/TD]
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24 | April 17, 2004 | very good |
42 | March 24, 2007 | very good |
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[TH="colspan: 6"][/TH]
[TD="class: metall, bgcolor: #F1E4D2, colspan: 6, align: left"]
Passages on auctions
[/TD]
[TH="bgcolor: #F1E4D2"]Auction number[/TH]
[TH="bgcolor: #F1E4D2"]Date[/TH]
[TH="bgcolor: #F1E4D2"]Lot number[/TH]
[TH="bgcolor: #F1E4D2"]Safety[/TH]
[TH="bgcolor: #F1E4D2"]Start[/TH]
[TH="bgcolor: #F1E4D2"]Care[/TH]
[TD="class: cost, align: right"]
100
[/TD]
[TD="class: cost, align: right"]
$ 60 000-80 000
[/TD]
[TD="class: cost, align: right"]
$ 60,000
[/TD]
[TD="class: cost, align: right"]
125
[/TD]
[TD="class: cost, align: right"]
$ 153 787-161 476 *
[/TD]
[TD="class: cost, align: right"]
$ 153,787 *
[/TD]
[TD="colspan: 6"]
* Trading in the ruble exchange rate on the day of the auction.
[/TD]