This keyboard is the board and keys only, no case.
Made by Maplin, it gave the ZX81 a more professional keyboard, in a case, with full travel and correctly marked keys for the little Sinclair machine.
The keyboard did not house the computer, instead two ribbon cables came out of the side, and would be required to plug into the cable slots inside the computer, making the appearance of a seperate keyboard.
More information here: http://www.zx81stuff.org.uk/zx81/hardware/MapsoftKeyboard/hardwarefiles/.Instructions.1.jpg
Manufacturer: Stonechip Electronics
Mapsoft Keyboard for ZX81 Manuals:
Mapsoft Keyboard for ZX81 Articles:
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This exhibit has a reference ID of CH46536. Please quote this reference ID in any communication with the Centre for Computing History.