Hey Cabers. I recently restored an older Park CR-2 Cotter Pin Remover Tool and has (#6176) and "Park Tool Co" in the casting. I believe the later versions (see pics 3 and 4) have just "Park Tool" in the casting. I was also wondering if there was actually a CR-1 and if so, when they may have made the change to CR-2 and from from "Park Tool Co" to just "Park Tool" in the casting. Trying to date my tool. The first two pictures are of the tool which I believe is older than the second tool I have in the last 2 pics. Also, the casting number is upside down on the first older tool, when compared to other CR-2 tools. Any input is appreciated!