They are indivual happenings. There will be no listings for these are they are "True Mint Errors." This is not a die event, but what you would expect on a mint error, they are just one offs. Not sure for the premium, but others will be able to give you a better idea.
The date area is not affected. The mark on the date is incuse, then it is coin damage from contact from other coins in circulation. The size of the devices there look normal from the image. But during the 1950's wheat cents there were a lot of worn die issues that are just die events. (Very common to see) But
Cuds on coins will be the only die event that gets a lot of attention. "Why?" Because an
Die Cud (on the outside edge of the die/coin) is a life ending retirement for the die. So when the machine is shut down, then you will only find a few of these. While other die events will have 1oo's of thousands of these die events. Hope this helps. (we are just scratching the surface on this gold mine so far)