How a crystal company reduced the number of crystals needed
I have always been intrigued by the International Crystal CB radios which had a unique appearance with a channel selector that resembled a telephone dial. The high end "Executive" models were big and expensive and sported an aluminum trim ring that no other radio had. So I had to buy one to play with.
It was cheap, like $25 and I always was curious about them because they were expensive and thus I thought, bigger and fancier than others. Which is true - bigness can come by way of empty space, however.