Many thanks for your comments. I am just a beginner on coin collecting. It was also surprising to find it in a Proof set. Anyway, I have taken other photos in color-one attached. I have other Proof sets and in all of them, the "R" is fully closed, but not in the coin shown in the photos
Recently purchased a lot of Proof sets finding a 1973 coin showing an irregularly open R in the word TRUST. A second Kennedy Half dollar dated 2004 having the " E PLURIBUS UNUM" motto extremely faded
Both coins are sealed Proof sets from the San Francisco mint
1975P Esenhower Dollar error
in Error Coin links
Posted
Thanks