The Last 'Blue Box' Proof Set
In the 1968 - 1972 period, the Mint packaged its Proof Sets in Blue boxes. Unexplainably, they did it again one last time in 1983. All 6 'Blue Box' Proof sets, in original Mint packaging,
1968-S
1969-S
1970-S
1971-S
1972-S
1983-S
