Blue Box c. 1972 designed by Steve Wozniak and marketed by Steve Jobs and Wozniak. Black plastic box measuring 4 x 2 7/8 x 1 1/2 inches, with thin plastic membrane keys mounted in cover plate, housing printed circuit board, loose wiring and 9-volt battery. Sold at Bonhams on December 6, 2017 for $125,000.
" On one occasion Wozniak dialed Vatican City and identified himself as Henry Kissinger (imitating Kissinger's German accent) and asked to speak to the Pope (who was sleeping at the time). Wozniak said in 1986:
I called only to explore the phone company as a system, to learn the codes and tricks. I'd talk to the London operator, and convince her I was a New York operator. When I called my parents and my friends, I paid. After six months I quit—I'd done everything that I could.
I was so pure. Now I realize others were not as pure, they were just trying to make money. But then I thought we were all pure.
Jobs later told his biographer that if it hadn't been for Wozniak's blue boxes, "there wouldn't have been an Apple." (Wikipedia)