Have a MP/mod10/12 that I need to get some info on.. serial hard to read... think it is 811158 first letter could be a "B"... last could be a 6... has English proof marks and England stamped on it.. its a hand ejector says 38 S&W special ctg no laynard ring but looks to be a pressure installed plug (retaining pin hole it there in grip) barrel is 4" sights are fixed lots of screws...4 screws in what apears to be side plate, one screw in front of trigger guard, one screw in front of grip frame.... any help with this would be great...