I recently purchased a left handed 110 in 22-250 caliber. It has a S date code for 1965 and it is the old design with the lug for the rear sight and old design bolt. From what I have read the 22-250 wasn’t offered in 1965. The serial # is 61283 and has a jeweled bolt, nice wood and no provisions for sights. What do I have here? Thanks for any input.