Grade of gun?
 

I am trying to determine the grade so I can order the letter, but I am having difficulty following the tutorial on the homepage. My gun has virtually no decorative engraving, but a bunch of letters near the serial number. Any help on how to decode this would be appreciated.

Gun is not listed in serialization book but should be a 0 grade judging by your other photos. See what the barrels are marked- probably plain twist.

The Serial number is the major thing needed to order a letter. If you are unsure of the grade, just put it down as a 0 or 1 grade.

Where are these "other photos"?

Other photos
 

As you can see, the right trigger needs some attention; it appears to fit properly with the mating piece, but the screw is badly stripped. Most other damage is limited to cosmetics on the screw heads and some significant gouges to the stock. Thanks for the assistance so far in helping decide if this is a zero grade or one grade. I am anxious to get the letter back.