If you don't know how to do this or are afraid to do it, take it to a watchmaker and bring your camera (with macro capabilities.
Explain what you want and if you ask nicely, he might do it for free :-)
He should be able to get the back off without any problem. Take some pics of the inside of the case. The csae and model number should be there as well as the gold content and a few other symbols.
Then take a pic of the movement itself. the movement number and some additional ionfo will be engraved on different parts of the movment. You can find many examples here. (ie. http://www.thehourlounge.com/thread/view/re-ref-6701-was-first-launched-in-1967-in-rose-gold-yellow-gold-and_68545_68583.html)
Then post it here for all to enjoy!