Usually the grade 2 guns had a good amount of engraving with a bear on one side and a deer on the other. I do not think the grade 1 guns typically have any animals on them. Just line engraving and light scroll. Maybe I am thinkkng of the 0 grade.
12 over 30-30 is a great combo. Does it have round breech balls or sculpted ones?
Stock damage on these guns is not uncommon. Many of them are found with blown out sections on the bottoms or split heads. It was surely a product of either wood quality it or the quality of the inletting and action design.