This is known forgery made, according to the rumors, in the city of Podolsk by local gypsies somewhere between 1989 and 2008 (?). The dies are different and probably the easiest way to distinguish is to look at the fonts - the forgery has the wider font lines, almost like a "bold" compared to the original. There is a lot of forgeries on Russian numismatic market - they were mass-produced in early 90s because of very high initial interest to this token. Most of forgeries are made out of aluminum versus aluminum-titanium alloy used for original issue.
Also, according to the information from the Russian numismatic sites, there are 2 variants of the original. One was issued in USSR and comes with the certificate or on a kind of coin card with a picture of the missile on it. Second version - again, according to some rumors - was made in US and has a serial number on the edge. I have no clue if the US version came with any kind of a certificate.
Just by the way, if you decide that you don't want it any longer - let me know, I'll gladly swap it with you.