Check the listing for details. MEDiCAL QUACKERY: Classic Quack Science Master Ray Violet Ray Machine - WORKS. Condition: Used, Made in United States. Listed at 140.00 USD. box is tattered a bit but the machine lights up and makes noise amd presents a bright violet beam.Medical Quackery Classic Quack Science Master Ray Violet Ray Machine is a unique and intriguing product that hails from the United States. This device, which falls under the category of Totally Bizarre and Weird Stuff, is designed to emit a violet ray for various healing purposes. Although its effectiveness and origins may be debated, this master violet ray quack machine is sure to spark curiosity and fascination for those interested in alternative medicine and vintage medical practices.box is tattered a bit but the machine lights up and makes noise amd presents a bright violet beam.Medical Quackery Classic Quack Science Master Ray Violet Ray Machine is a unique and intriguing product that hails from the United States. This device, which falls under the category of Totally Bizarre and Weird Stuff, is designed to emit a violet ray for various healing purposes. Although its effectiveness and origins may be debated, this master violet ray quack machine is sure to spark curiosity and fascination for those interested in alternative medicine and vintage medical practices.