The BIE cent is very common as the die has just a sliver of metal to make the separation between the B ( which is near vertical ) and the E ( which is vertical). Overuse f the die often had that metal portion breaking off and producing the effect. Jim
Here are some beginning info. Or google "process of minting coins" https://en.wikipedia.org/wiki/Coining_(mint) http://www.fleur-de-coin.com/articl...e=Links&utm_medium=301&utm_campaign=Redirects https://www.pobjoy.com/us/making-a-coin-the-process
Yes.. Common in the 1950's Quote - "The Majority of "BIE" errors occurred on Lincoln Cents dating in the 1950's" closed quote http://lincolncentresource.com/FAQ/BIE.html