Anyone ever seen something like this before? Since die cracks are varieties, I am sure there is more than one of these. It is for sale at Coast to Coast Coins. Almost a perfect circular die crack. I do not collect coins with die cracks, but I have to admit this is amazing. MS63BN by PCGS.
Nice coin. Maybe ex-Randall Hoard. A lot of them have that very distinctive circular crack. I don't know the variety attribution offhand.
This is an 1818 N-10 likely from the Randall Hoard of large cents. It's very common in high grade, and quite a dramatic example of a large die crack. These early middle dates are full of cracks and cuds, very interesting part of the series.
Die cracks like this are unusual, but they occurred more than you may realize. The cause is a combination of improperly treated dies and or planchets, and the proximity of the stars to each other in the design. The tips of the stars concentrate stresses in the dies and, if too hard (and therefore brittle), the dies will begin cracking and soon "connect the dots". There are many other coins which exhibit similar cracking, if not as spectacularly, Morgan Dollars and shield nickels being among them.
Yup. Here she is! 1820 N-13 That is a bit steep. CCC usually asks fairly strong prices for their coins. Also, that variety is very common in high grades, and that is not the nicest MS-63 I’ve seen for the date. Good luster, but unsightly splotches. The above coin is graded MS-62, and I got her for $650.
Not the coins, but the planchets before striking. As was mentioned, if the dies were treated wrong and were too hard, they became brittle. Too soft and they bulge and deform, losing detail.
Here is a 2009 CCF posting by @Conder101 that mentions annealing of large cent planchets (specifically regarding the Classic Heads, but it goes to confirm my thoughts that cent planchets were indeed annealed). @TypeCoin971793's 1820 N-13 is an absolute stunner.
Yes, the planchets are/were annealed (softened) and the dies hardened before striking. Any time you have an intricate design element (in this case the stars) cracks will form wherever there is a sharp, very angular direction change. In this case the star points, but you can always see them starting from T's, I's, or serifs in the lettering or digits.
He is definitely not in line with prices of comparable coins. Usually around 20% more. Never bought from him yet.
The die crack is definitely an interesting focal point of this coin. I share your admiration. What concerns me is the wear spots in the hair above the R and T and above the eye brow. Add in the splotches and I question how PCGS arrived at the grade of MS63.