Are these error wheat pennies? Pictures 1 & 2 shows a 1952 s but it seems half of the 1 landed on the s. Pictures 3 & 4 show a second 1952 s penny with the 9 filled in.
I am sure our resident expert @paddyman98 will be along anytime to fill in the blanks. I am not an error guy but I can tell you this..... Copper is a very soft metal and is very easily disfigured from odd hits and drops through its life. In all my years collecting coins, I have seen some very peculiar cents with anomalies caused by the copper being displaced from an errant hit. I would suspect that would be the case with your first cent.... Now the second one does appear to show a die chip in the "9". Some pretty cool stuff though I have no earthly idea what premium that may add to the old cent. Cool coins to build a collection from!
The first Cent is just an alteration that occurred during circulation. Not a mint error. The second Cent is a common Die Chip due to die deterioration on the number 9. Here is an example from my collection of 2 Die Chips..
What, @paddyman98 said. The 1 in the date on the first coin just got misshapen due to a circulation hit in that particular spot.
One thing I'll point out is that starting with the Lincoln cents in 1909, the complete date was on the master die. Thus it's impossible for a digit to land somewhere else, like on the S. There is a "dropped letter" error that could result in something like that, where compacted grease/debris falls out of the die onto the next planchet or the opposing die and is then struck-through as a recognizable letter/digit, but that's pretty rare. https://www.error-ref.com/?s=dropped+letter
