JOH 1921 Denver Morgan coins are additional unique varieties that were not quite significant
enough to warrant a VAM assignment, although many have been subsequently listed.
In the same manner as Leroy Van Allen and George Mallis coined the term VAM from the
initials of their last names, the authors of "Fun With 21", Rob Joyce and Jim Hart cataloged these with JOH numbers.
The abbreviation JOH is pronounced “Joe” when referring to the coins.