Whoops, oh well. I usually like to blur out any serial nmber I post but no biggy. And yes you are mostly right about serial numbers. The lower the number usually signifies older the production date of the gun but not always. Especially when it comes to S&W revolvers where the numbers can be all over th palce with no rhyme or reason. Anyway, the number of production I posted comes from the S & W standard catalong which are probably the most reliable numbers you can get for production number. So truly these original production 4567's are pretty rare. And technically I think they are also called the 4567-NS per that same S&W catalog.