1914-D Lincoln Cent
Although not as scarce as the 1909-S VDB Lincoln cent, the 1914-D coin comes in a close second with a mintage of 1,193,000 coins produced.
What makes this coin desirable is that uncirculated specimens were not saved in the same quantities that the 1909-S VDB coins were. Therefore, uncirculated 1914-D examples are scarcer than the more popular 1909-S V.D.B. coins.