Private U.S. Mints and in house metal refineries have numbered in the dozens over the years. Major minting errors from silver rounds to gambling tokens are very popular and eagerly sought by collectors. Erratic record keeping of mintage numbers and identifying which private mint produced major errors can be a challenge to research. It is in-fact on occasion impossible because many rounds and tokens were struck with no identification such as a specific mint's name, privy mark, or mintmark.
First is an undated 1 oz silver round with an American Buffalo and Indian Chief design on the obverse and reverse.
This silver round was both broadstruck and double-struck, on-center.
Struck by the Mason Mint (MM privy mark), it is located in Dade City, Florida. MM has been in operation since 2012. MM also produces legal tender coins such as the Robin Hood coin from Niue. Niue is a self governing island country in association with the country of New Zealand.


Next is an undated $1 brass Horseshoe Casino (now Binions) gambling token.
It is off center with the reverse being struck by a shattered die. This token was struck by United Silver Mint (USM privy mark).
I have been unable to find any specific background or historical information on USM. If anyone has any information on USM, please do share. Interestingly, I have found this particular Horseshoe token was never intended for active play. This would explain its absence in circulated condition.


Next is an amazing undated $1 Boulder Station Hotel and Casino gambling token.
It was struck on a thin planchet and is significantly underweight. Normal weight for this token is 21.2 grams. This thin planchet error weighs just 17.5 grams. Many of the outer design details are struck weakly or are completely absent on both the obverse and reverse. This is the first way underweight/thin planchet $1 gambling token I've encountered. $1 casino tokens are generally 21.0 grams or more in weight.
Struck by Casino Tokens INC, (CT privy mark) it is located in North Las Vegas, Nevada. CT began operations in 1993 and is operational to this day.


I want to take a moment and recognize one of the people behind the scenes for MEN... Sam Rhazi is the Production Editor for MEN. If there is anyone who knows what this position entails it is I. THANKS Sam! And it does not end there. For those who do not know it, Mike Byers publication of MEN has been ranked #8 on Spruces best ranked Numismatic Publications four years in a row... and Sam Rhazi has been a major spoke in the wheel for that effort!

