The following world gold double struck mint errors realized record prices in Heritage auctions.
Images Courtesy of Heritage Auctions, HA.com
India: British India. Victoria Mint Error Double Struck
gold Proof Restrike Mohur 1879-(b) PR62 NGC
SOLD ON NOV 1, 2024 FOR: $27,000.00
(Lot #30178)
British India. Victoria Mint Error - Double Struck gold Proof Restrike Mohur 1879-(b) PR62 NGC, Bombay mint, KM496, Prid-16, S&W-6.7. Royal Mint Style. Type B obverse with only the right stroke visible in the "v" on the ground-line of the bust. A most curious and engaging specimen, distinguished by the shadows of the obverse legends just slightly askew from their current placement. Few errors of this type occur on British India gold, this being the first instance we've seen, and should interest both type and error collectors.
Peru: Philip V gold "Mint Error - Flipover Double Struck"
Cob 8 Escudos 1741 L-V MS62 NGC
SOLD ON AUG 17, 2023 FOR: $24,000.00
(Lot #31268)
An Enchanting 8 Escudos
Philip V gold "Mint Error - Flipover Double Struck" Cob 8 Escudos 1741 L-V MS62 NGC, Lima mint, KM38.2, Cal-2159, cf. Onza-329-330 (Rare), Oro Macquino-329-330 (Rare). 26.90gm. A coin which functions as the perfect constellation of rarity, condition, and "uniqueness"--pairing a challenging date with an outstanding technical grade and an intriguing flipover double strike. Conservatively graded, this coin only shows few marks detectable even with magnification, and any perceivable flatness largely the result of the noted double strike. Both sides reveal especially thick die polish lines in the recesses between the raised features, adding to the feel that the coin has been minimally handled since its mintage. Although the details from the reverse die largely obscure several features of the obverse design, such as the mintmaster's initial, traces of the final digit can still be discerned under magnification, and the overall style of the dies is a clear match for other firmly datable 1741 Lima 8 Escudos.
Canada: Elizabeth II Mint Error gold Proof "National Parks"
100 Dollars 1985 PR68 Ultra Cameo NGC
SOLD ON JAN 7, 2019 FOR: $19,200.00
(Lot #34176)
Elizabeth II Mint Error gold Proof "National Parks" 100 Dollars 1985 PR68 Ultra Cameo NGC, KM144. Double Struck, and rather dramatically so. This gold Proof $100 coin has been double struck over about 60% of its obverse, warping the flan. Its very existence is remarkable considering the stringent production standards surrounding the minting of gold coins (as even the loss of a small amount of metal can represent a significant issue); what's more, the very fact it left the mint is astounding, being such a significant and obvious error. That being said, there is something immensely charming about this piece. Whereas numismatists are so used to seeing flat, motionless disks, this coin positively leaps out at the viewer, hurled into three-dimensions by the merciless crushing blow of the die. Every dynamic curve flows with gleaming luster, achieving a cameo frost to the devices even in its twisted state. A difficult piece to estimate as it is certainly unique; however, we do not doubt that its intrigue, rarity and significance will earn it pride of place in the most advanced collection of Canadian errors.
Great Britain: Victoria gold Mint Error - Double-Struck
85% Off-Center Sovereign 1863 MS66 NGC
SOLD ON AUG 25, 2022 FOR: $17,400.00
(Lot #34248)
Dramatic Mint Error Premium Gem Sovereign
Victoria gold Mint Error - Double-Struck 85% Off-Center Sovereign 1863 MS66 NGC, KM736.2, S-3853, Marsh-48. Variety with die number. A significant inclusion within the entire Sovereign series, not only because of the dramatic error bestowed upon this piece, but also its virtually pristine conservation, clearly recognized immediately after its production as a coin worthy of being set aside. Rarely is the opportunity to witness dramatic errors in gold with such frequency, evidenced by the paucity of auction representatives in recent decades, and generally only for slight off-centering. The current representative is certainly more stark than what is typically seen, the second strike being 85% askew, showcasing the denticles and "BRITA" of the reverse legend, while the obverse legend is only minorly impacted. What cannot be ignored is how impressive a level of preservation this representative has endured, showcasing practically nothing that would hinder a premium gem designation. While not represented in either PCGS or NGC's census, the piece at hand is one of two occupiers of an MS66 grade across all varieties, this and the subsequent lot, where even MS64s demand a hefty premium, and as such is wholly worthy of advanced collector interest.
Canada: Elizabeth II Mint Error - Double-Struck gold Proof
"National Parks" 100 Dollars 1985 PR67 Deep Cameo PCGS
SOLD ON APR 25, 2019 FOR: $15,600.00
(Lot #30732)
Elizabeth II Mint Error - Double-Struck gold Proof "National Parks" 100 Dollars 1985 PR67 Deep Cameo PCGS, KM144. This gold Proof $100 coin has been double struck over about 60% of its obverse, warping the flan in the process. Lemon-gold throughout, with plenty of detail to interest the eye for prolonged study. For such an error to have made it into private hands is rather remarkable. In fact, this is actually the second example of this error that we have offered. The first of which, a PR68, was sold in our 2019 NYINC sale, hammering for an impressive $16,000. Perhaps this offering will equally engage the large base of Canadian error collectors as well.
Canada: Elizabeth II gold Mint Error Proof "National Parks"
100 Dollars 1985 PR68 Ultra Cameo NGC
SOLD ON JAN 9, 2023 FOR: $9,000.00
(Lot #32154)
Elizabeth II gold Mint Error Proof "National Parks" 100 Dollars 1985 PR68 Ultra Cameo NGC, Royal Canadian mint, KM144, Fr-16. Obverse brockage, double struck. A wonderfully quirky mint error where a full mirror-brockage of the bighorn ram has been struck on the Queen's portrait, creating a 'ghost-like' image on the obverse. The reverse appears as if nothing much unusual happened to it, with a flashy field and the perfectly well frosted sheep relatively undisturbed by the incident creating this coin. Regardless, a highly unusual piece for the dedicated error collector, and one that lends further evidence that this was a rather error-prone issue.
Colombia: Philip V gold "1715 Fleet" Cob "Mint Error
Flipover Double Struck" 2 Escudos 1715 MS64 NGC
SOLD ON MAY 10, 2026 FOR: $7,930.00
(Lot #21115)
Philip V gold "1715 Fleet" Cob "Mint Error - Flipover Double Struck" 2 Escudos 1715 MS64 NGC, Bogota mint, KM17.2 (Rare), Cal-Type 243. 6.70gm. Salvaged from the "1715 Fleet" (Sunk off Florida's Treasure Coast). An enchanting piece with so much going for it, such as the near-Gem grade, the flipover Mint Error is visible on both sides, with the King's ordinal clear and the wreck provenance.
On July 30th, 1715, a Spanish treasure fleet, which would later be famously known as the 1715 Fleet, encountered a hurricane that claimed a sizable portion of its galleons and crew. A reported 1,000 lives and 14 million pesos were lost, including an equal amount of treasure in contraband. It's hard to estimate the value lost when measured in today's currency, but one can imagine the extensive caliber of cargo when considering the convoy was a combination of two different fleets: the Nueva España Fleet, which got stuck in Veracruz for two years before it could join the Tierra Firme Fleet. After more delays in Havana, a 12-13 ship convoy left with an enormous amount of accumulated cargo, never to reach Spain. The Spaniards salvaged the wreck for a few years afterwards, recovering nearly half of the official cargo from shallow-water wreck sites. Modern salvaging began when Florida resident Kip Wagner found a "piece of eight" at a beach after a hurricane and was intrigued by its origins. With old maps, metal detectors, a small plane, and a permit from the state of Florida, Wagner located wreck sites and artifacts, ultimately putting together a team of archeologists, divers, and investors. This was the beginning of the Real Eight Company. As the Real Eight team combed the seabed with suction machines, they found jewels, emeralds, Chinese porcelain, silverware, and gold & silver ingots. Furthermore, they found as many as 10,000 gold Cobs and over 100,000 silver Cobs. These huge discoveries uncovered yet-unknown numismatic pieces and ultimately made rare gold Cobs "common" (though still very high-end for collectors). The salvaged coins were mainly from Mexico, Colombia, Peru, and Bolivia, minted primarily between 1711 and 1715, although numerous earlier pieces from the 1600's were also recovered. As modern salvaging continues in these underwater sites, we expect many more exciting discoveries to be made, including the recovery of the last five or six ships that have yet to be found.
Great Britain: Victoria Mint Error
Double Struck gold Sovereign 1848 AU53 NGC
SOLD ON MAY 7, 2022 FOR: $6,600.00
(Lot #31957)
Victoria Mint Error - Double Struck gold Sovereign 1848 AU53 NGC, KM736.1, S-3852C. Double struck, with the second strike off-center. Due to the rigid quality controls in the production of gold coinage, errors were rarely missed as they left the Royal Mint; as such, this charming piece is highly unusual and very desirable to high-tier error collectors. This survivor escaped the quality control, ending only slightly handled and toned, presenting not only one, but two Mint errors! It was double struck, with the latter strike off-center, just enough for the two dates to be seen on top of each other, leading to a unique eye appeal.
Canada: Elizabeth II Mint Error - Double-Struck gold Proof
"National Parks" 100 Dollars 1985 PR68 Ultra Cameo NGC
SOLD ON JAN 12, 2020 FOR: $4,800.00
(Lot #30285)
Elizabeth II Mint Error - Double-Struck gold Proof "National Parks" 100 Dollars 1985 PR68 Ultra Cameo NGC, Royal Canadian mint, KM144. Exceedingly neat and attractive considering its status as an unintentional mint error, this gold 100 dollar coin represents a clear case of a capped die, with the edges uniformly folded upward to the reverse, Elizabeth's portrait on the obverse having been doubled from the subsequent striking of a new planchet. We have seen two prior instances of double-struck coins of this type, though never one of this nature, offering an intriguing intersection of visual and academic appeal.
Hungary: People's Republic gold Mint Error Double Struck
with Reverse Rotation "St. Stephan - 1000th Anniversary"
50 Pengo 1969 MS66 Deep Prooflike NGC
SOLD ON AUG 29, 2025 FOR: $4,560.00
(Lot #35421)
People's Republic gold Mint Error - Double Struck with Reverse Rotation "St. Stephan - 1000th Anniversary" 50 Pengo 1969 MS66 Deep Prooflike NGC, With a perceived mintage of 100, this rarity is the first of this type we've handled. A stunning mint error creates an ethereal effect on the reverse depiction of the Holy Hungarian Crown in center and surrounding legends.
