I just bought a new 442-1 and a new 642-1 yesterday. One has a late November 2011 date on the shell envelope and the other has a January 2012 date on the shell envelope. They are quietly making them both ways it would seem.

Here's the greater mystery to me: the 442-1 came in the same blue plastic box that we've all been used to seeing for years, but the 642-1 came in an old fashioned looking dark blue cardboard box! Serial numbers were factory correct and matched the gun on each box. What's up with that?