1971 D Doubled Die? Possibility

Die cracks are die events. As the die ages they develop as they are pushing metal into a different shape. The die cracks can see see mostly on the corners of the building. I remember seeing 3 corners cracked, but I don't remember seeing one with all 4 corners cracked. I found one years ago that had three die cracks that were not on the corners of the reverse:




But they are not a premium. They are common to find. They are a die aging issue.