Jasen Betts wrote in a message to Roy J. Tellason:

 RJT> -- it's black.  Markings are a logo that vaguely resembles a
 RJT> triangle (or greek letter delta?),

 JB> I forget whose logo that is.

So do I.  I used to have these books,  the sort of thing designed to
connect people with suppliers if you were an industrial buyer,  or a
manufacturer,  or similar,  and it had a bunch of logos in there on several
pages.  We're talking stuff the size of the phone book (large),  and either
a 3 or 4 volume set.  Not the "EEM",  which I'd been wanting to
get a hold of back then,  but something useful anyhow.

If I find 'em,  and I can get that scanner working on the software side
again,  then I'll scan the darn things in and build me a web page for
reference!

 RJT> followed by "ZNR",  which leads me to believe that this is 
 RJT> perhaps a MOV.  Under that it says "10K24IU" or
"10K241U".  
 RJT> There's some more stuff below that that I can't make out..

 RJT> Anybody know what this is?

 JB> sounds like a 240V MOV, could that be?  if so it'll be fatter than
 JB> your average disc capacitor.

I don't know why I'd have one with that rating,  maybe the number refers to
something else.

Since you bring up the dimensions,  it's a bit under half an inch in
diameter, a bit over an eighth of an inch thick.  Black in color,  looks
like the package was made by "dipping" whatever it is into the
packaging material.  Shiny,  though,  not dull like a ceramic cap would be.

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