Lot of (29) Proof Sets, 1968-1974. (Uncertified). All sets are housed in the original U.S. Mint packaging. Included are: (5) 1968; (4) 1970, housed in the original mailing box with label addressed to T B PICKENS; (5) 1971, housed in the original mailing box with label addressed to T B PICKENS; (5) 1972, housed in the original mailing box with label addressed to T B PICKENS; (5) 1973, housed in the original mailing box with label addressed to T B PICKENS; and (5) 1974, housed in the original mailing box with label addressed to T B PICKENS. From the T. Boone Pickens Jr. Collection.