Here is an unusual Macintosh keyboard made by Datadesk sometime in the early 1990s.  Their model 1069, also known as the Datadesk Mac 101E is an enhanced keyboard that will work with any Mac from 1984 through 1998.   

Datadesk designed a keyboard with the layout of Apple's Enhanced Keyboard II, and included an Apple Desktop Bus (ADB) port on each end: one for a mouse and the other for an ADB cable leading to the back of a 1987 - 1998 Mac.  However, they also included an RJ9 port for those with a Mac 128, 512, 512e, or Plus.  Those early Macs used a keyboard cable that looks like a telephone handset cable, but with two wires crossed inside the RJ9 connector.

I do not have a Mac Plus-compatible RJ9 keyboard cable, but I do include a long S-Video cable, which allows you to use the keyboard with any ADB-equipped Mac.

You will receive the exact keyboard and cable pictured here.  I have tested it successfully on a Macintosh Performa 630CD to make sure that each key (including the power button) responds properly.  I have given this keyboard only a very light cleaining.   I have not opened it up or tried to bleach out or scrub off the yellow.

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