1825 D.7-G (Z.7-BC) is part of the Square Tip family. Examples are known struck on both German silver and billon planchets. The current overall population is about a 12-15 examples.
 
This example has AG/G details, nice surfaces for the grade, and a period cursive W in the center of the reverse - similar to the low-grade 1815 CBH counterfeit still available.