Wayne Chirnside wrote in a message to Roy J. Tellason:

 RJT> In the meantime I *do* have a couple of "IBM" keyboards
here,  and hope
 RJT> they last...

 WC> Typing on one this very moment. One of the old heavy suckers too 
 WC> but the O and L keys are worn blank.

One of the ones here has a couple of blank keys,  but not because of wear. 
Apparently the "keycaps" that are on top are exactly that -- caps
on top of the keys,  I guess bearing different markings for different
versions of the keyboard...

IBM keyboard is the only one I've ever seen that was set up like that.  One
of the two here also has a connector at the keyboard end,  rather than just
having the wire going in like all the rest of them do.  Not the other one,
though.

And they are heavy,  yeah.

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