Four new reverses on the Lincoln cent (penny) are scheduled to appear in circulation starting February 2009 and will gradually make new appearances throughout the calendar year, in observance of the bicentenniel of Lincoln’s birth. Each design will emulate President Lincoln’s life from childhood up through his Presidency. The composition of these coins will be 97.5% zinc and 2.5% copper.
The original wheat reverse penny was indroduced in 1909 through 1958 and the latter reverse (Lincoln Memorial) was introduced in 1959.
Resource: Coin World Magazine