I know what he is talking about.
My 1980 to 1982 proof sets have (had, since they have long been cracked out and moved to albums) a plastic "sleeve" that the case slipped into. You could use that sleeve as a stand by inserting it into a different position. I think his problem is that the sleeve was misplaced and not included with the set he purchased.
The 1973 (first year that included the Eisenhower dollar) to 1979 sets had a piece that was attached to the plastic holder and flipped around to make a stand. Unlike the 1980~1982 sets, it would be less likely that this piece would be misplaced or separated from the set.
The 1983~ sets reverted to the 1968~1972 style and no mint issued "stand" was included.
My 1980 to 1982 proof sets have (had, since they have long been cracked out and moved to albums) a plastic "sleeve" that the case slipped into. You could use that sleeve as a stand by inserting it into a different position. I think his problem is that the sleeve was misplaced and not included with the set he purchased.
The 1973 (first year that included the Eisenhower dollar) to 1979 sets had a piece that was attached to the plastic holder and flipped around to make a stand. Unlike the 1980~1982 sets, it would be less likely that this piece would be misplaced or separated from the set.
The 1983~ sets reverted to the 1968~1972 style and no mint issued "stand" was included.





















