X-Ray vision

Two ads for similar "inventions", in the same science magazine of 1965. Is the market for these things that big?

"Amazing X-Ray", 1965

The line art of the ads says a lot about the business and marketing ideals of the companies that sell them - the one above is a bit of an amusement, whilst the one below has got an ominous, perverted tone to it.

"X-Ray Specs", 1965