Very nice example ... congratulations on the find!
Quote:
What is a struck through die cap?
There is ample expert knowledge available if you should search the CCF for those key-words ...
My limited knowledge amateur explanation is as follows:
On occasion a mint struck coin does not escape the striking chamber and instead remains attached to one of the two dies ... so all subsequent strikes of the dies have the 'attached' coin interfering with the new coins being produced.
The resultant coin is mushy in detail on the side where the 'die cap' occurred ... a result of the interfering coin blocking the die design details ... as evidenced by the OP example ... but usually fully struck on the opposite side since the coining pressure was not reduced.
The true experts can opine ... but that is the basic story of a capped die strike such as found by the OP.
David
Take a look at my other hobby ...
http://www.jk-dk.art