I am looking for info on these guns such as serial number info i.e. what was the range of serial numbers for these guns and did they have anything special in thair serial numbers like the letters "REG"? Is it true that some early pre model 27 smiths looked just like registered magnums and that some people might try to sell them as such as I've heard? Lastly whats the best way to ID one of these guns visualy,are there any special markings or things like that? Also is there an online source of info specificly of the registered magnums that relates to what I'am looking for thanks?