Firstly sorry if this is the wrong forum for this question but it didn't seem to fit in any of the forums. Please feel free to move it if required.
How do I determine the board revision of a Arduino 2560 board. Looking at the pictures on the http://arduino.cc/en/Main/ArduinoBoardMega2560
my board looks half way between R2 and R3 the USB controller is not rotated and I have option for a throw hold crystal. I think it is an official board it has the R2 designed in Italy silk screen on the back. I am just surprised not to find a revision number on the silk screen too.
Also where can I find the old schematics and layout for previous versions. As with all software open source projects I can find the old software files, but not the old hardware files. Where are they?
Thanks for reading my questions.