[pollkat]

I have this big cast iron round disc with drink coca cola lettering and the disc has a hole in the center. I saw different signs on the internet that have similar bases, though they are silver with red lettering. Mine is all a brown cast iron color. Some of the signs I saw were Mobil with a drink coca cola base and basic red and white coke signs attached to a pole, inserted in this large base. Does anyone know what this disc is and if is has any value? It is extremely heavy. I haven't been able to find any information on it and don't know what it is actually called. Thanks for your help.