The Denver Mint continues to be one of the two
largest producers of circulating U.S. coins, splitting those duties
with the Philadelphia Mint.
Since the American
Numismatic Association’s World’s Fair of Money was being held
Aug. 1 to 5 in Denver, Coin World was afforded an opportunity
to visit the production floor of the Denver Mint. Hopes to witness the
Denver Mint’s production of the Uncirculated 2017-D American Liberty
silver medal, the facility’s contribution to the four-piece American Liberty Four Silver Medal set that goes
on sale Oct. 19, were quashed, as production of the silver medals at
Denver was already completed by the time of Coin World’s Aug. 1 visit.
The fallout from the Enhanced Uncirculated Coin
Another column in the August 21 weekly issue of Coin World reveals
that while forms of numismatic literature like fixed-price lists
were meant to be fleeting, they can actually be quite useful.
Dies were being produced for Proof 2018-S coin output at the San Francisco Mint, including an obverse for a
2018-S Lincoln cent and a reverse for a 2018-S Block Island National Wildlife Refuge quarter dollar.
The Denver Mint’s die shop, installed in 1996, executes hubbing and
working die production for both the Denver and San Francisco
facilities after receiving master dies from the main die shop at the
Philadelphia Mint. The Philadelphia Mint also produces dies and other
tooling for the West Point Mint, in addition to its own needs.
Connect with Coin World:
up for our free eNewsletter
Like us on
us on Twitter
Personnel at the Denver Mint appeared to be quite quality conscious.
Signs are posted in die production areas as well as coin production
area with reminders of what do to do if anomalies are detected or
suspected. One particularly caught our attention in the hubbing room,
where a notice was posted on a hubbing press to ensure against
executing a hub that would result in dies that could produce doubled
One facet of coin production on display was the full inspection of
struck coins from a coinage press — in this case, Roosevelt dimes.
Every 15 minutes, a press operator would remove samples of struck
coins that had exited the coinage press and dropped into a holding
box. During the inspection, the press operator would use magnification
on the obverse and reverse, looking for defects and metal fill
problems, and also examine the reeding on the edge.
A freshly struck 2017-D Roosevelt dime was placed into an alignment
gauge, obverse facing up, to position the coin. The gauge was turned
over to expose the reverse to determine if the dies were aligned. The
die alignment line on the gauge was expected to orient between the E
and S of STATES.
Evidence of coin defects, die alignment problems or other anomalies
could result in a coin press output from a current batch being
condemned for later melting and metal reclamation, and the coinage
press fitted with a fresh pair of dies.
Visitors to Denver should make the Denver Mint one of their
scheduled stops and take the guided tour inside the facility that has
produced U.S. coinage for circulation since 1906.