No FG Error On 1972 D Kennedy Half Dollar

And that gunk on there makes it a pretty undesirable coin anyway :I

The '72-D No FG Half is a textbook example of a die abrasion "error". The error occurred on the die after it was put into service resulting in a collectible die variety.

Most die variety authorities have reservations about abraded dies being considered collectible die varieties.

With that said, being an FS variety listed in the CPG- it's an extremely rare variety with fully abraded FG. If it were me, I'd even hold onto the example you have. If nothing else, your coin is an excellent learning example which illustrates how the error occurs.