hi every one , looking for help again on value of, BSA improved model D with the large 45 in barrel , baynot underlever in 22 cal , serial number 48597 with number 2 under neath serial number , i beleave is 1911 to 12 ,has a 191/2 inch barrel , lincoln jeffries patent with number 8761/04 stamped on under side of cocking lever , has pistol grip stock 14 1/2 inch and trigger ajustment , on under side of barrel is stamped , rg no 479972 and 546 just up from it , on top of chamber is stamped , the bsa air rifle improved model D the birmingham small arms ,co ltd sole manufacturers ,all original screw one has been marked, needs small locking screw to secre the main screw to attatch under lever , sight blade and ajuster and barrel catch , no cracks in stock just some marks, still fires very well , again had it for years in collection , if any one can help as away to sell , have pics if needed , thanks bob