WTF - Mystery Quiz 1
Ok, I'm posting this here not because I don't know what it is, but as an interesting mystery, and bonus points to who can accurately identify this.
I might start a new "recurring theme" thread here.
The key to this is, must be 100% accurate on the ID.

I might start a new "recurring theme" thread here.
The key to this is, must be 100% accurate on the ID.

Comments
Nope.
Let me know when you all need a hint...
up.
Phil, it's not printers waste, nor wax paper.
Rene... the paper is not made out of surgical gowns.
George, you have the designs right.
In the U.S., see thru papers such as pelure/onion skin papers I think are known to have been used.
Aaaaaaaand, just to complicate matters and to possibly explain the existence of two different images, could this be an example of re-used Palimpsest paper?
Well, here's another 10-minutes of my life I'll never get back......cough up the answer, already, there Scott !!
There are a lot of right answers in there, but no "complete" answer.
So, this is an Essay. It comes from Henry Lowenberg's "Reuse Prevention" patents, none of which the US ever used, (Though, as Phil mentioned, there was a revenue used by Prussia, but it was very short lived).
This is a double-print. The 10c Washington 68 overprinted by the 5c Jefferson. SO the official ID of this is:
79-E67P5 and 79-E68P5. These were printed in sheets of 25, however this is the only known example remaining. And while it's a bit ugly, it was most likely from the left side of the sheet, as tiny margins of the other 3 surrounding sides show some part of either the Washington or the Jefferson, or both.
It is on "Goldbeaters" (aka Onion Skin) paper, and because it was for reuse prevention, it was printed in reverse on the gummed side of the paper. When applied, it would appear in the correct orientation.
An interesting piece, and shows one of the more elaborate Essay's ever proposed for postal use.