1876 Seated Quarter--Problem Or Problem-Free?

Look at the brightness of the reliefs on their high points versus the mirrors especially on the obverse. Also note the mottled appearance of the mirrors on both sides especially as you get around the perimeters of the reliefs and the devices. A truly untouched coin has an even appearance and not this type of look.

It was cleaned a very, very long time ago, probably with water and a rag and has since "retoned" or more precisely, has developed a newer layer of patina. Its much better than most and would in all likely hood make a righteous slab from a TPG and probably in the VF20/25 range.

I always love to show this example of a truly "never-been-cleaned". This is what 150 year old circulated silver looks like in its rawest and most natural state. Completely even surfaces throughout except the natural wear on the high points: