This is a very rare and beautiful Apple Lisa. A pice of Apple History and also a piece of Computer History. It seems to be a very special Unit, since the Front Bezel has Prototype written on the inside. So it seems to be a Prototype version. But I can't confirm it or guarantee it. Also I didn't find any other Prototype written somewhere else. It is in working Condition. The CPU, IO and both Memory Boards are in working condition. The Widget Drive also turns on and doesn't show any error message. I didn't test further than the window opening when the Widget drive is ready. I assume you have to install a program first to continue. The Drive is not testing, so assume it is for repair not working. The Case has some yellowing which is normal for its age, but has no damages or cracks. Also the Screen doesn't have any lines in real life. It looks very crisp and beautiful. All in all a very beautiful Apple Lisa for a Museum or Collection.