Ive owned a couple, there are several versions of the speedmaster 2 different watch faces also quartz,automatic etc, there are a lot of fakes about even with the serial numbers and matching cards etc so need to be very carefull. Either go to a good second hand watch seller like wachfinder on the net or go on tzuk forum some pop up on there regulary.
Live life to the full and enjoy, try and help people who havn't got as much as you, you never know what tomorrow will bring!!!!