Dave writes:

1787 New York-Style Brasher Doubloon, EB on Wing

1787 New York-Style Brasher Doubloon, EB on Wing, MS65? NGC. CAC. W-5840. The New York-style Brasher doubloon is arguably the world's most famous numismatic rarity, and the Stickney-Ellsworth-Garrett-Partrick example is the finest of the mere seven known specimens. It is a coin any collector would love to own, but only one will be able to possess. Acquired by pioneer numismatist Matthew Stickney in 1848, the present coin has been offered publicly only twice in all the intervening years since its discovery. On both occasions it set a world-record price for any coin ever offered at auction.

In its first appearance, in Henry Chapman's sale of the Stickney collection in 1907, it realized $6,200, shattering the record of $2,165 set by the redoubtable 1822 half eagle in the S.H. & H. Chapman sale of the H.P. Smith Collection the year before. It also far-outdistanced the Stickney 1804 dollar, which sold for $3,600. This amazing record stood for 22 years. In its second offering, from the fabled Garrett Collection in 1979, it realized an equally spectacular total of $725,000, a record price that was not surpassed for a decade. Thus, for longer than any other coin, the Stickney Brasher doubloon held the title of "the world's most valuable coin." Heritage Auctions is indeed privileged to offer the finest-known example of the celebrated 1787 New York-style Brasher doubloon in this once-in-a-lifetime opportunity.

Obverse: The obverse was adapted from the state coat of arms of New York. The sun is rising over the peak of a mountain with a body of water in the foreground. Brasher's name is spelled out below the waves, in small letters. This central device is enclosed within a circle of beads. The legend, around: NOVA EBORACA COLUMBIA EXCELSIOR with each word separated by a rosette. This legend translates to New York, America, Ever Higher. Excelsior remains the state motto to this day.

Reverse: An eagle with wings displayed, and a shield covering its breast, has a bundle of arrows in its sinister claw (to the observer's right) and an olive branch in its dexter claw. Thirteen stars surround the eagle's head. This central device is enclosed in a continuous wreath. Around, the legend: UNUM E PLURIBUS with the words separated by stars. This legend translates to One of Many. Below, the date 1787 is flanked by rosettes. These devices are similarly used on the Great Seal of the United States. As on most coins of this era, the denomination was not specifically expressed.

On one example of the New York style doubloon, Brasher impressed his counterstamp on the shield on the eagle's breast. On the other six known coins, the counterstamp was placed at slightly varying locations on the eagle's left (facing) wing.

The New York-style Brasher doubloon in this sale combines beauty, history, eminence, and rarity. This is the finest example of the world's most famous coin. Once ensconced in the prestigious cabinets of Stickney, Ellsworth, Garrett, and Partrick, it is now being made available at auction for only the third time since Ephraim Brasher minted it in 1787. Many will vie for this incomparable prize, but it will elevate the cabinet of only one fortunate collector.

To read the complete lot description, see:
1787 DBLN New York-Style Brasher Doubloon, EB on Wing, MS65? NGC. CAC. W-5840....(https://coins.ha.com/itm/colonials/1787-dbln-new-york-style-brasher-doubloon-eb-on-wing-ms65-ngc-cac-w-5840-pcgs-487-/a/1326-3934.s)

1786 Brasher Lima Doubloon

1786 Brasher Lima Doubloon MS61 NGC. CAC. W-5820. Ephraim Brasher's 1786 Lima style doubloon is one of the most elusive and enigmatic issues of early American coinage. First discovered in the 1890s, only two examples of this mysterious issue are known to numismatists today. The Partrick coin is by far the finer of these and the only one with enough detail to decipher the all-important peripheral date and legends. Struck by famous New York silversmith Ephraim Brasher in 1786, the Lima style doubloons have always been overshadowed by their more famous New York style counterparts. However, the Lima doubloons are even rarer and may be of equal or greater historical importance. Heritage Auctions is pleased to offer the finest-known example of this iconic rarity in just its second auction appearance.

Composition of the Lima Style Doubloons Confirms Authenticity
Although the Lima doubloons were intended to closely resemble their Spanish counterparts of the 1740s, specifically the Philip V eight escudos of 1742, Brasher included their true date of manufacture (1786) in the peripheral obverse legend. Unfortunately, the legend overlaps the edge of the coin on one example of the Lima doubloon and is almost completely off the flan on the other. Only the bottom portion of the date was actually impressed into the surface of the present coin, leaving later numismatists to guess at the identity of the four digits partially displayed. The first two numerals were easily recognized as 1 and 7, but the bottom of the third figure was variously interpreted as 0 or 8; the final symbol was thought to represent either a 0 or a 3. The 1914 ANS committee of Wayte Raymond, Edgar Adams, and William Woodin conjectured either 1700 or 1780 for the date, and B. Max Mehl in his 1922 James Ten Eyck catalog thought 1703. It was only in 1991, when Michael Hodder carefully measured and analyzed the features of the coin offered here, that the correct date of 1786 was established.

In his detailed 1991 study entitled "Ephraim Brasher's 1786 Lima Style Doubloon," which was published in the 1992 ANS anthology Money of Pre-Federal America for the Coinage of the Americas Conference, Hodder reported the findings of several scientific tests conducted on the Lima style doubloons and their New York and Spanish counterparts. Elemental analysis determined that the compositions of the New York and Lima doubloons were virtually identical, but differed measurably from the earlier Spanish coins. Brasher's coins contained about the same percentage of gold as their Hispanic prototypes, but varied in the amounts of silver and copper in their alloy.

Hodder's painstaking efforts revealed the date on the obverse:

To read the complete lot description, see:
1786 DBLN Brasher Lima Doubloon MS61 NGC. CAC. W-5820...(https://coins.ha.com/itm/colonials/1786-dbln-brasher-lima-doubloon-ms61-ngc-cac-w-5820-pcgs-491-/a/1326-3935.s)