This is a complete obverse die trial including the date, in white metal, of the regular with drapery design but with the drapery area under Liberty's left arm apparently removed.
The image above shows an enlargement of the drapery area. The roughness in this area seems to imply that the drapery was removed.
The illustrated example is the only one confirmed to exist and is ex Heritage 1/06 FUN, Stacks 7/08, StacksBowers 8/14 ANA - PCGS62.
Photos courtesy of Sarasota Rare Coin Galleries.