Well the first thing that tipped me off was the stars.http://www.coinfacts.com/half_dolla...llars/1838_half_dollars/1838o_half_dollar.htm If you want to take it somewhere take it to your nearest dealer.
Your coin has a mintage of 20 which makes it one of the rarest US coins. Unfortunately your coin is a fake. (Counterfeiters like to counterfeit rare and expensive coins.)
Bummer I figured when I read about it but you never know until you ask. Thank you.. I don't think there is a dealer around here... thanx again