Could you please provide me with some context and information about the 1776 to 1976 half dollar coin you're referring to? Is it a commemorative coin issued by the United States Mint to mark a specific event or anniversary? If so, the value of the coin can vary greatly depending on factors such as its condition, rarity, and the demand from collectors. Additionally, the value of coins can fluctuate over time, so it's important to have the coin professionally appraised to determine its current worth. Do you have any more details about the coin that you can share?