The serial number should have a C prefix. Could be either a commercial M&P airweight (pre-12) or a M13 Aircrewman that has had the US markings removed.
Are there any markings on the top strap? The markings on the top strap of my Aircrewman are intact but the U.S. Air Force markings on the backstrap are ground off.
It cannot be a Model 13 - That was a .357. As stated above, it would have to be a M13 (with military markings) or a pre-Model 12 with the alloy cylinder
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Need help badly m13
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