I picked another classic last week and it ended up being a B series like my other classic. The plate that displays the serial number is completely different on the two guns. The left is my chrome classic and the right is my new classic. I was told the gun on the right was a PD trade in and it does have some markings on the bottom of the grip and on 2 of the mags. Just checking to see if anyone else has drastic differences like this on like series models. Also would like to know what the markings on the bottom the grip are for?