Your coins are Mint Sets. Not Proof Sets. The one with the red is from Denver. The one with the blue is from Philadelphia
Posted 05/22/2020 11:32 am
The 1990 Proof set has the error, they were all in a hard plastic lens with a purple background.
What you have pictures of are 1990 mint sets. the cent is a P mint (the philadelphia mint doesn't use a mint mark on cents except for 2017).
The error would not be found in the mint sets which have coins from both Philadelphia and Denver.
The Proof set should have S mint coins from San Francisco, with the exception of the error cent which the S was left off of the die and coins were struck without the mintmark.
What you have pictures of are 1990 mint sets. the cent is a P mint (the philadelphia mint doesn't use a mint mark on cents except for 2017).
The error would not be found in the mint sets which have coins from both Philadelphia and Denver.
The Proof set should have S mint coins from San Francisco, with the exception of the error cent which the S was left off of the die and coins were struck without the mintmark.
