(click on pictures to enlarge)

colorgraph This is a high-quality piece with nickel-plated trim.  The unique feature of these is the cap, the top of which is angled.  Since you turn the cap to advance the lead, it looks a little funny.  In this picture, I've turned the cap with the low side facing forward. 
 imprint

Here's a close up of the imprint.  I've searched the patent databases looking for the U.S. Colorgraph Corp. as an assignee, but I haven't had any luck finding anything.

I've seen a handful of these over the years.  All are in the black and pearl color shown, and all have been in working order. 

  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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