somewhere in the 8 net 6 or 6 net 4 range, it would not grade cleanly at a TPG due to the corrosion on the reverse.
Obverse G-4 Reverse G-6 In 1815 a volcanic eruption occurred at Mount Tambora in Indonesia. The eruption was so strong that the worldwide average temperature was reduced by about one degree. This led 1816 to be known as the Year Without A Summer. In June of 1816, it was snowing in many areas and there was also a worldwide famine. Some people in China and the Middle East reportedly sucked on clay to get the minerals they needed to survive. So this coin has some history behind it. (This story is true.)
The cent was also the only coin made by the Mint that year. Why? Because a fire at the Mint early that year destroyed the rolling mills needed for producing gold and silver planchets. (Copper planchets were supplied from England). It took over a year to rebuild the building and replaced the machinery. (The horses used to power the rolling mill were also eliminated and the Mint got it's first steam engine. Use to power the rolling mill, not for coinage.)