Yeah, it does tell you the System file version. I did it on the PB and it just said 7.1. Just for fun I did Get Info on Finder too. It says version 7.5.1, and below the word Finder next to the icon in the Get Info window it says Color SW 1500 v. 2.2.1. I also remember seeing color-related control panels. That's interesting considering it's a monochrome display.