Mauser PO8 Luger serial no. question

[rustyzipper]

Thanks Norm, so the example in your picture is 4770Y, is that correct? So I am assuming that mine is the 23rd Mauser in the W series. All this is very interesting. Are there three different bore sizes for my model? Mine is 8.83. Do all three shoot the same ammo? I know its a dumb question.