This coin is a Top 100 Morgan Silver Dollar VAM 198 1878 7tf Variety.
The variety shows a doubled date, doubling in the IBERTY portion of LIBERTY, and doubling in NUM within UNUM. All stars are doubled as well with tripled cotton bolssoms.
What are TOP 100 Morgan Dollar VAMs?
In 1996 Dr. Michael Fey and Jeff Oxman published the TOP 100 Morgan dollar varieties with the intention to focus collectors and dealers on the most extravagant VAMs known. The identification of the TOP 100 VAM list has moved many of them into the mainstream collecting of Morgan Dollars. Many collectors regard many of the TOP 100 VAMs as a must to complete a Morgan Dollar collection such as the 1882 O/S, 1900 O/CC, Hot Lips, and Scarface varieties. The TOP 100 varieties are also certified by the major grading companies which allow collectors to amass complete registry sets for the TOP 100.