A very fine best quality rising bite ejector rifle. The side lever opener is unusual. Amount of case color hard to see in your photos. If the bores are good,and no real "problems", value probably in excess of 25K. Do you have the original case? The rifle pad detracts a bit. I don't have my serial list here, but would guess production about 1902. Good .303s are hard to come by. If you are looking to sell, I might be interested

All the best, Mal