These came with a typed note reading, "These are two developer's models vintage Macintosh Computers. They both came out months before the release to the public. One is a 128K 1984 macintosh that was upgraded to 512k, it is upgraded to 512k, it is M0001W. The serial number is BCG9GRM0001. It has a very low serial number. It is unusual because it also contains a hyperdrive, and the upgrade was very uncommon at the time. The 1986 Macintosh SE has dual floppy disks, and an added hard drive. The 512k has a checkerboard display when powered on. This is probably due to a leaking capacitor. The Macintosh SE has a dead battery, when trying to power on, there is mechanical movement but no picture. Included are the original cardboard boxes, original styrafoam, original carrying case for the 512k. There is also an original box for the keyboard of the 512k. All parts are not there. A printer is included along with many floppy disks that came with the computers. This is not a complete set, most items are there but there may be some missing."