Collectible coins include a variety of types such as commemorative coins, bullion coins, and circulation coins. The 1 One Cent Penny, specifically the Lincoln Cent, is a prominent example in U.S. numismatics. The Lincoln Cent has undergone several design changes, with the Bicentennial and Shield reverse designs introduced in 2009, marking the 200th anniversary of Abraham Lincoln's birth. The Philadelphia Mint is known for producing coins without a mintmark, making its coins particularly collectible among numismatists.

Item Denomination Series Year Mint
2009-P (Philadelphia) Lincoln Cents - Bicentennial and Shield Reverse 1¢ (One Cent, Penny) Lincoln Cents - Bicentennial and Shield Reverse 2009 Philadelphia