I found this one while CRH. It looks like a die clash to me. I think I can see the shield from the reverse and some of the rays on Kennedy's ear/jawline/cheek. The full picture of the obverse and reverse shows this may have been struck a little off center? I am not sure what to call this, but there is a definite ridge visible at the bottom of the coin. Please let me know your thoughts.
@fioti - Thanks for the link to that site. I also did not see anything similar to this.
Based on the overlay Coop provided and the ones at maddieclashes the shield is not part of the clash. It looks like just rays. I think I can see the curve of the banner in the lower set of rays. I may have to submit the coin to the fine folks at maddieclashes to get their input.