@SC, a small technical point, but when the coin has an entire area filled in by extra metal (like the top part of the number 8 on your '58 D cents), we say that the die had a broken post rather than calling it a die chip.
"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