Welcome to Coin Talk. AS @Santinidollar said, please post clearer photos of both sides of the entire coin and a closeup of where you think there's an error. Thank you. (Can't see much from the photo you posted).
Looks like normal circulation wear. What is a double died? How do you pronounce helpppp? Worth? 25 cents!
Your coin has a very slight Misaligned die strike on the obverse. Which may be the cause of some Machine Doubling (which I can't see from your photos). There is not a listing for Doubled Die at varietyvista.com for 1976-P coin. http://www.varietyvista.com/09b WQ Vol 2/DDO Listings.htm http://www.error-ref.com/broadstrike-uncentered/ http://www.error-ref.com/machine-doubling/