Posted By:
runscottI was very skeptical and got no legitimate "brown-positive" responses to my board postings about brown Old Mills (only one typically confrontational one from the self-proclaimed experts at t206museum.com) ...however, a fellow collector DID eventually send me a scan of a real brown Old Mill, and it was the same color as a brown Hindu, so now I believe.
I've also heard tales of the overprints, but I've never seen one.