1834 15-O is from the very large Clinton Head family. Most varieties in this family were struck on billon planchets, while about a quarter were struck on German silver planchets, such as this one. This variety is very rare with just 3 documented examples, which is actually the median rarity for this family. This variety also was struck on a planchet with the lettered edge variety RE.110-AAL (publication on lettered edge die marriages forthcoming). This lettered edge die marriage has only been documented with 1 other die marriage, 1834 17-Q.
 
This example exhibits VG/F details but has planchet surface issues on both sides.