It was intended to prevent against costly neck reset operations by allowing the user to easily adjust the angle of the neck to the body. But you can also find them on other 30s lines like the Kay Deluxe. It first appeared in 1932 with the line of Kay Kraft instruments that it is best associated with. The Zorzi adjustable neck joint was invented by Joseph Zorzi who was hired at Stromberg-Voisenet in either 1926 or 1927.
