The question does not say which country.
The U.K. uses the penny, with lettering ...
Elizabeth II · DEI · GRA · REG · FID · DEF · 2015 ·
J.C
ELIZABETH II DEI GRATIA REGINA FIDEI DEFENSOR
Elizabeth 2nd, by the Grace of God, Queen and Defender of the Faith
Engraver: Jody Clark
Your answer depends on the date on the penny.
if you earn a penny and you save it
The initials a.m. stand for ante meridian, Latin for "before noon." The initials p.m. stand for post meridian, Latin for "after noon."
A penny is a unit if currency (money), thus one penny means one unit/coin of this currency (1p).
Rare penny issues primarily include the 1909-S V.D.B. penny, known for its designer's initials on the reverse, and the 1914-D penny, which has a low mintage. Other notable rare pennies are the 1922 no mint mark penny, often misidentified due to its lack of a mint mark, and certain varieties of the 1955 double die penny. Collectors also seek out errors, such as off-center strikes or coins with significant flaws.
The "LB" on a 2013 penny refers to the initials of the designer, Lyndall Bass. "JFM" is the engraver's initials, which in this case signifies Joseph Menna.
It is the initials of Victor David Brenner, the coin's designer.
KG is the initials of the designer, G.E. Kruger-Gray.
FG are the initials of Frank Gasparro, who designed the Lincoln Memorial reverse.
These initials belong to Victor David Brenner. He designed the front of a Lincoln penny.
Your answer depends on the date on the penny.
The inscription actually reads V.D.B., not V.O.B.These are the initials for the designer of the penny: Victor David BrennerSee more here: http://coins.thefuntimesguide.com/2008/07/1909_lincoln_cent_penny.php
bat man
James Cash Penny used his initials to name his store.
The VDB initials, which stand for the designer Victor David Brenner, are located on the reverse side of the 1918 penny, specifically at the bottom near the edge, just below the wheat stalks. These initials are a small but significant detail that denotes Brenner's contribution to the design of the Lincoln penny.
Frank Gasparro
The letters "FM" on a penny refer to the initials of the engraver, Frank Gasparro, who designed the reverse side of the Lincoln Memorial cent, which was issued in 1959. The "F" stands for Frank, and the "M" represents his last name, Gasparro. These initials can be found on the base of the Lincoln Memorial design. The use of engraver initials is a common practice in coin design to credit the artist.