According to Jay Marshall, Kuda Bux invented the Tube Illusion which he called "Seeing Through the Girls" back in the 1940's. Later he became famous as the man with the x-ray eyes.
Sometime in the late 40's or early 50's Jay Marshall saw Kuda Bux perform the Illusion and was baffled by it. Jay told me that he got one of the girl assistants drunk and she reveled the secret.
Sometime later Jay was able to get the dimensions of the illusion from a duplicate that Kuda had sold to a very wealthy amateur magician who had promised Kuda that he would never perform the illusion publicly.
Jay asked me to build a copy around 1960. At that time Jay believed that Kuda was no longer performing. My brother and I performed the illusion for the first time on 10/8/1961 for a large group of magicians at a party celebrating Francis Marshall's 25th year in magic. The party was attended by a many of the most famous magicians in the country including Faucett Ross, Al Flosso, David Hoy, Stuart Cramer, Dia Vernon, Don Alan, Senator Crandall, Okito, Phill Willmarth, Jerry Andrus and Johnny Platt.