File:US-00010-One Cent (1974) Aluminum.jpg - Wikipedia

Platinum: Mineral information, data and localities.

U.S. Mint recovers 1974-D aluminum cent - Numismatic News

1974 1C Aluminum (Regular Strike) Lincoln Cent (Modern) - PCGS CoinFacts

Braunite: Mineral information, data and localities.

The 1974 Experimental Aluminum Cent Project

1795 Liberty Cap Cent : History & Value

The 1974 Experimental Aluminum Cent Project

1795 Liberty Cap Cent : History & Value

National Museum of American History

1974 Aluminum Lincoln Cent

Penny (United States coin) - Wikipedia

Light-emitting diode - Wikipedia

1980 Lincoln Memorial Cent : History and Value

What Makes a 1974 Silver Dollar Rare? - Hero Bullion

Canada Cent KM 28 Prices & Values

NATIONAL ONE CENT DAY - April 1, 2024 - National Today

1958 Wheat Penny Coin Value (Price Chart, Error List, History & Varieties)

1820 Liberty Head Large Cent Value

United States 1914-S 1 Cent Lincoln Wheat Penny Coin - The Toronto Coin Shop