The gun is definitely a side-lock model genuine LC Smith, and the pics are indeed very poor (most likely for a number of reasons); but given that the markings are on the rib and not the barrels, this gun would most likely be a pre-13 model. I hope you didn't buy this gun; as it has been terribly and unprofessionally "restored". Anytime you see a re-blued frame on a vintage double that is not a good sign; and given that the seller did not provide a grade, those could be blued-over Damascus barrels. And although it is a desirable 20-bore, time the gun is properly restored one could probably buy two original 20-bores already in good unaltered condition. I could nit-pick this gun for hours; but you get the point.
