That's the monogram of Frank Gasparro, who designed the reverse side of the coin.
Victor David Brenner designed the front side with Lincoln's portrait. His initials are in extremely small letters under the fold of Lincoln's coat, next to the edge of the coin.
The abbreviation of FG on a U.S. penny stands for the name of the man who designed the back part of the coin. His name was Frank Gasparro.
FG are the initials of Frank Gasparro, who designed the Lincoln Memorial reverse.
Frank Gasparro
The "FG" on a 1984 US penny stands for the initials of the coin's designer, Frank Gasparro. He served as the Chief Engraver of the United States Mint from 1965 to 1981.
On a penny on the tails side on the right side of the Lincon Memorial the are 2 letters which are FG. It stands for frank Gasparro. Frank Gasparro designed the Lincon Memorial so his initials are on the right hand side of the Lincon Memorial.
In 1959, the US Treasury bgan minting Lincoln Cents that were 0.950% copper; also, a new reverse design of the Lincoln Memorial was composed by Frank Gasparro (FG)!
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14k fg wedding band
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3 Points for a Field Goal in (American) Football Game
FG = 6 :)