Hello to everyone. I have searched the internet high and low, and I can not find another Tokarev like the one that I have. From what I have learned about them, I am thinking that the one that I have is a Chinese Type 51, but I am certainly not sure. The most interesting thing about mine is that it has only one mark of any sort. There is a 5 clearly stamped on the underside of the top slide (you can see it in the picture below). Other than that, this one is plain Jane. There are no import marks, no serial numbers, nothing. I thought that this might be an M20, but even those seem to have serial numbers. Can anyone make heads or tales out of this one? Thank you to everyone for their help with this. Oh, and I found this forum VIA my Google researching session on the Tokarevs. Thanks again guys!