What is a rare year for Lincoln Pennies?

A number of Lincoln cents are considered to be rare and valuable. At least 3 of them are error coins (marked with a "*" in the list below).

Some of the most important ones are:

1909-S

1909-S with the designer's initials VDB on the back (very scarce)

1914-D

1922 with a missing mint mark (due to a die error) *

1943 struck on a bronze blank *

1955 double-die

But in case you're thinking of going through piles of pennies looking for one of these, none have been found in circulation in decades.