Kennedy Errors ? Please Help...

You can add 1999 to that list. I have the 97&98 seen in roll for about 5 years with the same die crack. It seam like they just craved a new date in that die and put it back in service?

This is an area of extreme stress on the dies. This die crack is a common occurrence on Kennedy half dollars starting in around 1995. To a discriminating collector, they would diminish the value of a coin as it is common and detracts from the appearance of the obverse of the coin.

An error expert who knows how common these are would not pay a premium for these.

Thanks,
Bill

A die crack can occur on any coin from any year at any Mint, it is basically a stress fracture in the die. Die cracks, unless very large, sometimes command a very small premium but not much of one since they are considered to be a normal part of the minting process. If that die crack develops into a die break, those are much more desirable and rarer. A die break will have pieces missing from the die as evidenced by larger raised areas(on the coin, not the die) along a crack and they can take the form of a Cud as well(a portion of the edge of the die breaks away producing a large "lump" at the rim extending into the coin). When a die break occurs, the life of the die is just about over.

The one caveat is that die cracks on proof coins usually do have a premium since those are not considered to be part of the proof minting process and proof coins are usually inspected at some point.