French 19th Century Reversal Image, Which is My Portrait? organic It is in great vintage

It is in great vintage condition and measures 10 1/2" in diameter

Or just cross your eyes

with one dark spot as documented in photos

There is no inset on the back

2" across at base and 2 7/8" across at lip

French 19th Century Reversal Image, Which is My Portrait? organic It is in great vintageWhat a curiosity! I was pretty excited to find this little antique French reversal drawing, which I believe dates to the 1840s or so, when optical illusions because a big thing in France (check out the phnakisticopes published by Joseph Plateau) and reversal portraits were circulated. (I'm including one by Daumier in the photos) This one has a very contemporary feel to me, perhaps in part because the human face keeps reminding me of the late great