I just received a 100' extension cord which I purchased from a seller on eBay. The cord was advertised as 12/3 ... but I believe it is actually only 16/3. Because the original packaging was not included, I am not sure who the manufacturer was ... but it weighs about 8 pounds, and has a tag (shown below) on it that reads "10A 1250W".

I would grateful if someone could confirm that the cord I received is NOT 12/3 cable, but rather 16/3, based on the rating on the tag and the cord's weight?