Most pennies minted before 1962 contained 95% copper. Since 1982, pennies are composed of copper-plated zinc (2.5% copper). This photo shows a comparison of the two types of penny. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source |
Taille de l’image : | 6000 px × 4000 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |