@ell, as a general rule, toning should not affect the grade since that is purely an assessment of damage/wear. Also, in some cases, artificially toned coins might be called out. With that said, there are plenty of folks who like an attractively-toned coin, so of course keep it if you like it!
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz