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<p>[QUOTE=&quot;Bob Evancho, post: 3357212, member: 84595&quot;]DON&#039;T try to wipe it off.&nbsp; DON&#039;T play with the coin in any way.&nbsp; You may have a retained letter debri from the D mint mark.&nbsp;&nbsp; The D is incused in the die and makes a raised D on the planchet, coin.&nbsp; The die has an incuse mint mark which, when it strikes a coin causes the planchet metal to fill the D under pressure.&nbsp; Sometimes the mint mark, in this case a D, becomes filled with grease and metal.&nbsp; This results in weaker and weaker D on the cent until it is no longer visible on the coins struck.&nbsp; Study the 1922-D and the weak D variety which eventually became the no D weak reverse varieties.&nbsp; As the metal chips, flakes, etc.&nbsp; and grease press together under the striking pressure, the debri becomes very hard.&nbsp; Sometimes the filled material in the mint mark dislodges and falls out on a blank planchet anywhere and when the die strikes the hard debri on top of a planchet, the debri makes a mark in the die.&nbsp; It could be just a mark, it could be a complete letter,&nbsp; it could crush to nothing and be a struck through grease or material.&nbsp; Remember under striking pressure, heat is created and the dies get hot.&nbsp; Your HOT D may have fallen on your struck coin and your coin was ejected before a blank came into the collar die.&nbsp; Now that the filling debri had fallen out of the mint mark area, the next cents have a D mint mark again.&nbsp; Error collectors such as Paddy or Fred Weinberg can explain this better.&nbsp; What a retained dropped letter debri error is called, others will know.&nbsp; But DON&#039;t tamper with the coin.&nbsp; Research first and ask the experts.[/QUOTE]</p><p><br /></p>

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