Posted by David Williamson on November 20, 2014, 9:13 am, in reply to "Model #s"
There were many grades made, usually on the receiver's water table will be the serial number and below that a name or number stamp, the same on the barrels water table. Also on the older ones that had a short extension rib between the barrels and the loop you will usually see a number stamped there.
If you go to the Home page scroll down to Shotguns, it opens to the right, go to Grades and it will give you a description of all.