This is one of the more common early commemorative halves, with over 1.3 million minted. Your coin appears to have slight wear but it probably makes AU-50 for details. The dark color could be natural but overall it does look like a coin that has been cleaned at one time.
The Red Book shows a value of $70 in AU-50 but that is high retail, for a no-problem coin. I'd expect this coin is worth anywhere from $35 to $50.
The Red Book shows a value of $70 in AU-50 but that is high retail, for a no-problem coin. I'd expect this coin is worth anywhere from $35 to $50.



















