1971-D Kennedy Half Dollar Missing Ear

Note the ear area is showing lines that are in a different direction than the die was trying to form on this area. It was blocked with grease in this area and prevented the ear to form in that area. It is called a "Struck through error" (grease). This is common to see some areas where where is blocked. But they get more interesting when a large portion of the devices are blocked. (80-95%)

Knowing what caused this is the real knowledge of this happening is real value for your coin. Some on ebay may show interest. But the more devices blocked out is what error collectors prefer.

I think a Grease Filled Die, plus less than a full strike.

Now I get it! Super useful and informative post Coop.

That's really cool! Despite what coop says about many desiring more devices blocked, I think the position makes it interesting too. Missing an ear jus catches my attention more than detail in the hair, etc.

I wouldn't have known what it was without this thread though, so thanks for the lesson!