The Cause Of The 1922 Plain Lincoln Cent?

In a book titled Looking Through Lincoln Cents on page 93 it is noted that there is no official records of that situation of the 22 no D. Or the Denver Mint made some Cents with out a D and just didn't want the government to know. Or there is no such thing and collectors and dealers everywhere are playing a joke on us all. Or the P Mint made them and didn't tell anyone. Or all are made in China. Or I really don't know.

Answer: Poor quality control, asleep at the switch as these were pounded out. All of the die pairings were a mess by the time they fell into disuse.

It didn't take long, apparently, for the shallow incuse "D" to be ground down.

Quality control at the Denver and SF mints was an ongoing problem, especially during the 1921-1926 era, when weak strikes from deteriorating dies were common.

So true!

I've gone through a lot of branch mint coins from that 1921-1926 period looking for nice AU+ coins (with some red in them) for my main Lincoln set, and more often than not, you find coins poorly struck on one or both sides from that era. I've seen plenty of BU coins from that era with NO wheat stalks at all on the reverse!