King SA 380 15" (actually 16") Autoplaner
Here is the manual for this model planer (thanks to Angie (Vindaloo) for converting it for me). This manual should also cover a number of other planers such as Delta and Jet that use the exact same castings and gearbox as this machine. So if you have a planer with fixed bed and a 2 feed speeds of 16 and 20 feet per minute there is a good chance that this is the same machine.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.