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I have a pair of 1390702s and a single 1390876.
122key terminals, "M" I believe.
This recycler, you can go through the boxes, replace missing keys/caps...no tax, etc.
So far so good. :-)
Need a Keyboard Babel translator or the USB Keyboard controller to make them functional on a PC.
You can also use Kishy's method as well.
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Spec_57