I came across this 1954 proof quarter and noticed that something was different, anyone know what kind of error this would be? Thanks
Different as in hazy and spotted? Rounded rim? Wide looking letters? Give us a clue as to what you see.
On the R in quarter there are lines and between D and O and L in dollar there are lines. And check out the A and R in dollar.
That looks like "die polish." This may start a big fight as some don't like the NORMAL & VIRTUALLY UNIVERSAL use/and definition (BY US MINT EMPLOYEES) of raised lines on a coin caused by incuse scratches on a die. So, Look closely inside the "R." If the inside is flat and mirror-like as the rest of the field and there are a few "raised lines" above the flat area, that's what you are seeing. DIE POLISH FOR SURE as I just blew up your photo.