The point of this machine is to test your lungs. What you do is put a penny in, Grab the hose and blow until you’ve either passed out or raised all the divers. The divers raise one at a time. Collectors of Penny Arcade machines are not certain this was ever made since no existing examples have ever been found. From: http://www.arcadetreasures.com/arcade/Submarine_Lung_Tester.html