Just bought a 1952 TO 30. Seems pretty stock in appearance. I'm confused on the 6v and 12v battery systems. The owner said it was 6v and battery had died recently and he stuck a 12v battery in it to start it up and put on the trailer to deliver to me. Once at my house, he cranked it up and drove it off the trailer into my yard and seemed just fine. I'm confused as I thought a 6v system was positive ground and 12v was negative ground. I took the battery out after he left just to be safe. I was under the impression that putting a 12v battery into a working 6v system would blow the battery or start shorting things out. Any help and comments and suggestions would be greatly appreciated. Knowing beforehand that the tractor was a 6v I had ordered the 12v conversion kit offered here and it's supposed to arrive next week. But I'm confused as to how it worked with him putting in a regular 12v battery already and the tractor seemed to run fine. It still has a generator.