Bonded coins are created when the feeder system, which supplies blank planchets to the coin press, malfunctions and jams. When this occurs, a struck coin is not properly ejected and another planchet is fed into the collar and is struck. This struck coin will land on top of the previously unejected strike. These coins will then crush and bond together. This may happen multiple times as more coins bond.
This Lincoln Cent has been bonded on three irregularly shaped copper-zinc planchets.
