Copper Content Of British 2 Pences And 1 Pence?

The bronze alloy varied a little, but not much. Not less than 97% copper, with tin and zinc being the variable amounts. The reason for the variation has to do with the fact that old bronze pennies were sometimes recycled. Their record of alloy also has slight variation.

A common alloy is 97% copper, 2.5% tin, 0.5% zinc.

Being bronze alloy, the tin is always in the majority of the alloying metals, 1.5% to 2.5% being normal.