thin

went to clear the saddness off my face Had attended an interment full of grace grabbed my detector and went to my happy place walked my mind into empty space the beeping brought me back to base the days are not guaranteed none to waste. found a broken spoon, I didn’t break it, I wish and...

Ok this one is not mine, but was sent to me to help figure it out. So I'm asking for help since I don't have the an answer for him. It's a Jefferson Nickel that is ultra thin, weighs 1.9 grams and if you look it's thinner on one side than the other. Is it play money, a counterfeit, or an error?