Walter Breen
1961
Set. [3,028,244] As in 1959.
1962
Set. [3,218,019] As in 1959.
1963
Set. [3,075,645] As in 1959. Queue on nickel retouched.
1964
Set. [3,950,762] As in 1959, save that the half dollar is of the Kennedy design obv. by Gilroy Roberts, rev. by Frank Gasparro. These were delayed in coming out, and as a result some speculators were selling futures in Kennedy proof sets even as in rolls of half dollars. This seemed to me at the time to be one of the most cynical events in numismatic history. I understand that some of these, shall I say, enthusiasts lost their neckties, if not their shirts, and serve them right. The sets are now easily obtained for a price. Hoarding has been done with perhaps more of what JFK used to call "vigah" than on most other post-1950 dates: not that hoarders will grow rich from it.