The simplest explanation is usually the right one.
http://en.wikipedia.org/wiki/Occam's_razor
While I do not intend to discourage theorizing and discussion, it is far more likely that this was factory cut, and carved, soiled, and marked by a collector in the normal course of 100+ years. When you are dealing with very very small sample sizes you have to be really careful about making assumptions about the entire universe.
As my friend once said about my first apartment in Brooklyn, "You may only see one cockroach on your counter, but that means there are thousands behind the walls."
I suspect the longer you guys engage in an expanded discussion of T206 backs -- and I am just one collector who has put together 521 unique T206 fronts in recent years without ever hardly peeking at the backs -- you will continue to unfold mystery upon mystery. Rather than jump to conclusions, wouldn't it be better to test hypotheses?
For those of you who think this Schulte is a unique, one-of-a-kind scrap, how much would you pay for a TPG example? Put your money on this one publicly and you encourage the public to actively pursue more examples.