1992 D Close AM Transitional Variety
Until 1992, both proof and business
strike Lincoln cents were made using
the same type of reverse die all with a
Wide AM.  In 1992 the mint created a
new reverse with a
Close AM for that
seems to be intended for use starting
with 1993 cents.  All 1993 cents, proof
and business strikes, have a
Close AM
reverse.    However, 1992 and 1992 D
business strike cents have been found
with
Close AM reverses.   Although
several 1992 D Close AM's have been
found, they are still considered
extremely rare.  There has only been
one 1992 Close AM found.  

Click here for more information about
Wide and Close AM varieties.

Photos courtesy of Josh Haynes.