Guys: Thanks for keeping this thread alive. I just found a CS-1 with the 2 and M marks as described above. Clearly it was a Glenco modified gun. I did not get a box or papers with it. It appears to not have been fired much at all. The only thing I am unsure of is the chambers, all six are perfectly chamfered, like you would see on Performance Center gun. I am not sure if that is a part of the original specifications or not.
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Captain Dave Funk
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