The 1978 is actually a blob of glue or something added to the coin, then was set on another coin while the substance dried. If it were a squeeze job the impression would be directly into the cent whereas this job the impression is on something above the surface of the coin.
The 1957 cent was plated in something magnetic. It is not original from the mint as it is, the details are too soft and the coin takes on a plated look. A wrong planchet coin would still look like a naturally struck coin but would have different characteristics in the metal - such as it being magnetic.
The 1957 cent was plated in something magnetic. It is not original from the mint as it is, the details are too soft and the coin takes on a plated look. A wrong planchet coin would still look like a naturally struck coin but would have different characteristics in the metal - such as it being magnetic.



















