is a Peace or Morgan Dollar die variety
that has been identified in an important book called The Comprehensive Catalog and Encyclopedia of Morgan and Peace Dollars
by Leroy C. Van Allen and A. George Mallis. The term VAM derives from the first initials of V
llen's and M
allis' last names.
The great popularity of noting the many die varieties found, especially on Morgan Dollars, has led to the term VAM
being used to describe practically any deviation from a "normal" Morgan for that year and mint, such that people talk about having found a "VAM" when the variety they note hasn't even been assigned a VAM Number
See also: VAM Numbers
I love hunting for overlooked VAMs
when I'm searching through the trays and boxes of Morgans at a coin show.