hello. First post for me. I just got this old workhorse, but noticed some interesting markings. My search didn’t lead to any info on the open net. Best I can make out: On the right side barrel breech area are the letters: D. L. & Co P (the is the beginning of a word, but all subsequent lettering is extremely diminished) Also there is a cartouche of a bug- beetle- or fly of some sort with the letters D and L placed respectively on each wing. The cartouche is placed semetrically on both side plates. Seems to be just slightly less than 12 gauge size at the muzzle. I need to get a better measurement device.. Please help.