After looking at some other mac classics, the sticker that is on this one was a factory placed sticker. The other ones have the same bar code sticker, but where "serial number 0" is, it says "Manufactured June 1991". It does not have a not for resale sticker like other prototypes. But that could have been removed. It has the old external monitor port added on to it, but I need to dig up an old monitor, or get raped by the local apple man for the adaper (If he even still has one). This is a wierd one. It was worth the money for the head-scratching it has given me so far. I think im going to crack her open soon!