This is a thrift shop find. It is missing the granite plate. If you can find or make one, you'll be in business! Other than that, it appears to have had little or no previous use. Possibly a customer return.
Note that the rated 1200W is the total wattage when using both sides. At 600W each, they don't put out a ton of heat, so I think this setup is probably best for melting cheese or cooking thinly sliced meat. Thick meat would probably take a long time. I did test the burners. They both work and showed 580W power draw on my meter.
Thanks for looking!