This is a nice King Super 20 Silver Sonic, serial number 319706. At first glance the sax looks like a plane old lacquer super 20. But what you are looking at is a true Silver Sonic model that still has the original gold lacquer over spray over the sterling silver bell. This is extremely rare to find and almost unheard of at this point.
The tenor also has all of the classic Super 20 features. Sterling silver neck, pearl side and palm keys.