This is a Raymarine Type 100 12V autopilot. It comes with a gimbaled fluxgate compass, a rudder reference unit, a Seatalk cable, and the owner's manual.
The computer definitely works, as I swapped it into our current Raymarine AP system and it controlled the boat, took commands from the control head, and followed a navigation route from the chartplotter. I have not tested the rudder reference unit or the compass.
I also have a ST6001 control head for sale in a separate post.
Price is $400 +shipping. Item is located in Brunswick, Georgia.