The quarter on the right is thicker than the "average" quarter (pictured left). Does that make it special in any way? I do not know if it matters, but the thicker quarter year is 1977. Thank you
First, welcome to C.T. you need to post close-up cropped pics of both sides of questionable coin to get answers. Until then....
There is a thickness tolerance, but you'll need more knowledgeable opinions than i can offer. Be patient and you should receive some replies. @paddyman98
What you have is a Misaligned Die Strike. It caused one side of the rim to rise due to a Higher than normal pressure strike because of the misalignment. The other evidence is the collar clash. It's a mint error but common.
I knew it was "off" but was unsure as to the magnitude of importance that may or may not go along with it. Thank you for the info.
Only if it is also SIGNIFICANTLY heavier. Thickness at the edge is more a function of the strength of the strike. A heavier strike means the rims fill better and the edge of the coin is thicker. Two planchets of the same weight (and hence thickness) one struck at say 60 tons and the other at 75 tons, the 75 ton coin will be thicker.