Quarter Error?

It's a minor 'misaligned die'. Normal if the reverse is centered.

rockdude:

Doesn't a mis-aligned die have to be off by at least 10 to 20% to be considered for any premium value?

I wonder if you have this confused with the rotated die examples?

It is a misaligned die or referred to as a MAD coin. The obverse die can be adjusted to center it over the reverse die. The reverse die is fixed. Thus when the dies are not in true alignment, you get coins like the above that have a wider rim (still circular because of the outside edge of the die) one direction or the other. The operator notices this and can fix it or just go with it as is. Seems like this is not always noticed because of the number of these found. But the ones that get collectors excited are the ones where the devices fall over the edge of the coin. Like this example:

There are other examples that are collectible as well caused from running a mad die too long, but I won't go into that at this time.