Is it mechanical doubling or other issues on the 1986 D. The 1956 D looks weird does anyone else see an S between the 9 and 5
The '86 is since and NAV Doubling. The 1956 looks like a normal circulated coin. No extra S but the 9 did take a hit as it's flattened.
You need to read the rules of Coin Talk and then post under the appropriate forum, which sounds like "World Coins" would be it. Jumping in on someone else post is considered "hijacking" and impolite. Good luck.