This one is listed in the Scott catalog and I believe I may have one. I have not been able to find an image of this which would either confirm or deny it, so here it is.
This is a very different shade of the $1.00 Eugene O'Neill stamp, Scott 1294, but is this the color listed as 1294b, the black violet color?
It is a MNH plate block, tagged. The plate block following it is a normal 1294, also tagged, for comparison.

