to a great place to learn more about coins! Your quarter has most likely a heating blister of some kind, meaning it was subjected to high heat, like in a 
. I don't really see anything special about the reverse though, except a semi damaged surface. A misaligned die is a completely separate topic here where the obverse die gets shifted slightly relative to the reverse and then you could get a 'double rim'.
Posted 12/09/2021 9:36 pm
I agree that this coin was subjected to extreme heat to possibly separate the cladding from the copper core.
Collecting since 1972. Learning from then on
"Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin
7070 type set coin count: 51/76
Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars
Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents
"Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin
7070 type set coin count: 51/76
Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars
Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents
