I've seen pictures of the keyboard that came with the PCjr by IBM. The first keyboard that came with it was a chiclet-style keyboard and it was seen as one of the reason the whole PCjr flopped. To save the project, IBM made an 'enhanced' keyboard that looks like it could be clicky / buckling spring and I find it sort of cute.
Wikipedia has a picture here:

Does any of the guru's here know for sure what kind of keyboard this is ? Is it buckling spring or something else ?
ciao,
J.