1964 P Proof - Kennedy Half Dollar w/accented hair

This U.S. Mint set in the original packaging with certification, has the first year of the Kennedy Half-dollar. The early version had more accented texture in the hair just to the above right of the ear. According to reports, Jackie Kennedy didn't like the way it looked and subsequent set were created with more subdued lines. Surprising that there weren't any listed here at this time.