"Franklin Half Dollars with Major Varieties, Proof (1950-1963)" Slot for the 1961 50C DDR

ProudVet

The required coin: The 1961 50C DDR Proof is listed as a variety within this registry set. I have a 1961 50C DDR FS-802 Certificate # 12465180. For some reason the series won't recognize this coin... even though this variety is one of several known doubled die reverses (DDRs) for the 1961 Proof Franklin Half Dollar, though not the most dramatic. The much stronger FS-801 variety is also a significant entry in this set. Can someone either explain why it won't accept it or provide some guidance to get it recognized? Thanks R/John