Author Archives: Ken Potter

A tail feather hash mark noted on the San Francisco “no mintmark” bullion coin housed in the 25th anniversary American Eagle set no longer seems unique to the set. The hash mark is also turning up on “no mintmark” San Francisco bullion coins that were struck and released earlier this year to the investor market and also slabbed as San Francisco coins by third-party grading services. Continue reading →

Numismatic News reader Dan Matsanka reported finding three 2011-P reverse proof silver American Eagles that sport a die crack on the obverse that runs horizontally through the lower portion of Miss Liberty’s gown. Continue reading →

Is there a way to identify a San Francisco Mint silver Eagle that doesn’t have a mintmark on it once it has left the 25th anniversary set? Continue reading →

Two down, one to go. That sums up California collector Lawrence B. Gratt’s quest to own examples of each of three proof platinum Eagle errors reported earlier this year. The question is will he get that elusive third piece? Continue reading →

Two interesting die clash errors showed up at the Detroit Coin Show Sept. 29-Oct. 1. The clashes appear on a 2011-P Rutherford B. Hayes Presidential dollar and a 2011-P Olympic quarter. Continue reading →

Longtime Illinois variety coin specialist Rick Carlson has found what appears to be one of the strongest and perhaps one of the rarest Class I doubled die reverse cents known in the Lincoln Memorial cent series. Continue reading →

From hard to buy gold errors to errors on popular collector coins, this year I had the privilege of seeing many of them at the American Numismatic Association World’s Fair Of Money Aug. 16-20 in suburban Chicago. For a greater part of each day, I spent considerable time sitting behind the Combined Organizations Of Numismatic Error Collectors of America’s club table explaining to folks what kind of errors and varieties they brought for review. I also scrounged the floor to find a few neat errors and varieties to shoot photographs of. Continue reading →

Just when you’d think that everything that was major for a coin over 20 years old had been found, up pops a beautiful 1988 doubled-die cent that almost rivals that of the 1984 cent. The doubling on the 1988 is very strong on the earlobe. Continue reading →