I have a Smith & Wesson Hand Ejector 1st model (Triple Lock) in .455 that I would like to identify and date. The serial number, 15055, falls outside of the published serial number range. It also has the make and caliber marking on the left side of the barrel which is contrary to the info I have been able to dig up. The logo on the right side of the frame is different and smaller that the other logos on my .44 and lower numbered .455. There are no British proof marks and it appears to have never been refinished. All of the other features are standard and original. I am attaching a couple of pictures and would be grateful if anyone can shed a little light on this. Thanks...