Mr. Cassagnes, an electrical technician, came upon the Etch A Sketch idea in the late 1950s when he peeled a translucent decal from a light switchplate and found pencil-mark images transferred to the opposite face, the Toy Industry Association said.

WSJ: Etch A Sketch Inventor Dies at 86

Then an electrical technician, Cassagnes came upon the Etch A Sketch idea in the late 1950s when he peeled a translucent decal from a light switch plate and found pencil mark images transferred to the opposite face, the Toy Industry Association said.

NPR: Inventor Of Etch A Sketch Dies In France At 86

So, the images should be viewed in the opposite order.

FORBES: No, Google Didn't Drop The Dead Donkey

Some art historians now prefer to view Pop as a subversion of American values, to read, say, Billy Al Bengston's chevron images as antimilitary or Roy Lichtenstein's cartoons of jet fighters as antiwar, when opposite interpretations are equally sensible, if not more so.

WSJ: A Dissonant Side of Pop | Dark and Deadpan: Pop in TV and the Movies | Whitney Museum | By Richard B. Woodward