Since then a third example has been found, and it was also graded by NGC.
According to an April 6, 2015, article by Jeff Starck in Coin World, the 1999 mule “was struck using a 1999-dated reverse die showing Winged Liberty matched with an obverse die that was intended for use on the 2000 Libertad silver 1-ounce coin, or ‘onza.’ In 2000, Mexico adopted a new obverse for the Libertad coins, one showing multiple emblems encircling the longstanding, familiar eagle-with-snake-on-cactus design instead of just the central coat of arms by itself.”
In McGrady’s view, the 1982 doubled die reverse Libertad is even more special than these other rare Libertad varieties. That is because it is the first year of issue for this series, which means it went undiscovered for 34 years. Only three examples have been discovered, and McGrady owns all of them (the highest graded example is graded MS-67).
McGrady added that he thinks this coin is likely to remain elusive “because the doubling is not as obvious as it is on the 1987 or 1988 double dies.”
Another of McGrady’s finds is a 1990 Libertad that he purchased on eBay, thinking it was a Proof. But when he received it back from NGC, it was assigned a grade of MS-67 Prooflike, making it the first Brilliant Uncirculated Libertad coin to receive a Prooflike-designation from a grading service, a rare find indeed.
Since then, the 2015 Reverse Proof coin that was released in two special sets with a mintage of 1,500 combined has been graded by the services as Prooflike too. The difference is that the 1990 coin was not intentionally struck with a special finish, while the 2015 coin was.
McGrady also wanted to highlight for other collectors his Proof 1998 tripled die, one of only three known, that was given a grade of Proof 67 by NGC, which made it the highest-graded of the three known examples of that coin.
Growing collector base
As interest in the Libertad silver series continues to grow, new collectors might discover other rare varieties.
McGrady also noted that to put together his top-ranked sets and discover these rare varieties he submitted well over 300 coins for grading.
Libertads tend not to grade as high as other major world bullion coins, perhaps because of the large open fields on what collectors generally consider the reverse (but which the Banco de Mexico considers the obverse side). In fact, only four Libertads issued between 1982 and 2010 have been graded MS-70 by NGC and three at PCGS, including a 2000 coin that McGrady owns, which was the third example from that period ever to receive an MS-70 grade from NGC.
McGrady clearly took to heart the advice often given to collectors to pick a series, specialize in it, and really stick with it to get the most out of that pursuit.
His experience shows that by doing that, a collector has the ability to become very knowledgeable about the series and even the potential to build a world-class collection.