Editor's Note: It has been a very active summer and mint error sales have been very strong. Here are a few examples from Heritage Auctions, Stack's Bowers, GreatCollections, and Mike Byers. These are worth publishing since they are either unique, brought record prices, or both.

The following mint errors were recently sold by Heritage Auctions

Images Courtesy of Heritage Auctions, HA.com


1860-O Half Dollar
Indented by Half Dime Planchet, Mated Pair
MS63 PCGS

Sold For: $219,600.00
(2026 August 31 - September 5 ANA US Coins
Signature® Auction #1396, Lot #3542)

---

1944 Lincoln Cent
Struck on 2.9 Gm Steel Planchet
VF35 PCGS

Sold For: $23,790.00
(2026 June 29 Error Coinage US Coins
Showcase Auction #60547, Lot #53042)

---

(1913-38)-S Buffalo Nickel
Struck on a Silver Dime Planchet
AU58 PCGS

Sold For: $19,520.00
(2026 July 16 - 18 Summer FUN US Coins
Signature® Auction #1394, Lot #3139)

---

1864 Two Cent Piece, Large Motto
Double Struck
MS62 Red and Brown ANACS

Sold For: $18,300.00
(2026 June 29 Error Coinage US Coins
Showcase Auction #60547, Lot #53157)

---

1965 Washington Quarter
Struck on a 90% Silver Planchet
AU58 NGC

Sold For: $10,370.00
(2026 August 31 - September 5 ANA US Coins
Signature® Auction #1396, Lot #3398)

---

1974-D Eisenhower Dollar
Struck on a 40% Silver Dollar Planchet
MS62 PCGS

Sold For: $8,845.00
(2026 June 29 Error Coinage US Coins
Showcase Auction #60547, Lot #53423)

---

The following mint errors were recently sold by Stack's Bowers

Images Courtesy of Stack's Bowers Galleries


1906 Indian Cent. Struck on a Quarter Eagle Planchet.
AU-58★ (NGC).

Sold For: $207,400
(Summer 2026 Global Showcase Auction, Lot 2597)

---

(2000)-P Sacagawea Dollar. Muled with a
State Quarter Obverse. MS-67 (NGC).

Sold For: $158,600
(Summer 2026 Global Showcase Auction, Lot 2606)

---

Two-Piece Set of 1912 Pattern Buffalo Nickels.
Uniface Obverse and Reverse Electrotrials.
Design by James Earle Fraser. MS-64 (PCGS).

Sold For: $122,000
(Summer 2026 Global Showcase Auction, Lot 2048)

---

1995 Roosevelt Dime. Muled with a Lincoln Cent Obverse. MS-64 (NGC).

Sold For: $85,400
(Summer 2026 Global Showcase Auction, Lot 2601)

---

1993-D Lincoln Cent. Muled with Roosevelt Dime Reverse.
MS-66 RD (NGC).

Sold For: $53,680
(Summer 2026 Global Showcase Auction, Lot 2598)

---

1901/0-S Liberty Head Half Eagle. FS-301.
Struck 10% Off Center. MS-64★ PL (NGC).

Sold For: $51,240
(Summer 2026 Global Showcase Auction, Lot 2607)

---

Undated (1913-1938) Philadelphia Mint Buffalo Nickel.
Type II. Deep Reverse Die Cap. AU-58 (PCGS).

Sold For: $51,240
(Summer 2026 Global Showcase Auction, Lot 2600)

---

1976-D Eisenhower Dollar. Obverse Die Cap. MS-67 (NGC).

Sold For: $48,800
(Summer 2026 Global Showcase Auction, Lot 2605)

---

1937-D Buffalo Nickel. Struck on a Cent Planchet.
MS-64 BN (PCGS).

Sold For: $43,920
(Summer 2026 Global Showcase Auction, Lot 2599)

---

(1921)-S Morgan Silver Dollar. Struck 45% Off Center.
MS-63 (NGC).

Sold For: $39,040
(Summer 2026 Global Showcase Auction, Lot 2603)

---

1922-S Peace Silver Dollar. Struck 15% Off Center.
MS-65 (PCGS).

Sold For: $31,720
(Summer 2026 Global Showcase Auction, Lot 2604)

---

The following mint errors were recently sold by GreatCollections

Images Courtesy of GreatCollections


"Gold Washington Quarter" 1970-S Washington Quarter
Overstruck on 1898 Gold Liberty Half Eagle 8.3g
PCGS Proof-66

Sold For: $120,937.50
(Sep 13, 2026)

---

"26 Cent Coin" 2000 Lincoln Cent Struck on
2000 Statehood New Hampshire Quarter PCGS MS-65

Sold For: $16,962.50
(Sep 20, 2026)

---

1973-S Eisenhower Dollar Clad Proof Double Struck
2nd Strike 40% Off Center PCGS Proof-68 DCAM

Sold For: $16,875
(Sep 27, 2026)

---

1943 Lincoln Cent Double Struck
PCGS AU-55 (Ex. Lonesome John)

Sold For: $13,943.25
(Aug 30, 2026)

---

The following mint errors were recently sold by Mike Byers

Images Courtesy of Mike Byers, mikebyers.com


WWI Victory Medal Uncancelled Reverse Die
From The U.S. Mint in Philadelphia
Extremely Rare

Sold For: $75,000

---

Mated Pair of Proof Ike Dollars
Struck Off-Center on 1¢ Planchets
NGC Proof 67 RB
UNIQUE

Sold For: $35,000

---

1929 Buffalo Nickel
Struck on 10¢ Planchet
Second Finest Known
PCGS MS 64

Sold For: $34,000

---

1932 Washington Quarter Obverse Plaster Model
Designed and Sculpted by Laura Gardin Fraser
Adopted Obverse Design for the 1999 $5 Gold
George Washington Commemorative
UNIQUE 11½" Plaster Model

Sold For: $25,000

---

2022-D American Women Quarter
Wilma Mankiller
Struck on 5 Cent Planchet 4.95 Grams
PCGS MS 64
UNIQUE
Only 2 Off-Metals Known for the Series!

Sold For: $20,000

(eBay #278049027596)

---

Indonesia 100 Rupiah Uncancelled Die Pair
Obverse 100 Rupiah 1973 (Circulation Coin)
Reverse 100 Rupiah 1978 (Commemorative Coin)
NGC Certified & Encapsulated
Unique Discovery

Sold For: $18,000

---

Gold Obverse Trial Strikes
c.1612 Gold Coronation Medals - Matthias II and Anna
Austria - Holy Roman Empire
Listed & Illustrated in Forschner
PCGS MS65 and MS64
1 of Only 2 Known Sets

Sold For: $14,640

---

2013-D Lincoln Shield Cent
On Struck 2013-D Roosevelt Dime
Double Denomination
PCGS AU 58
Unique for the Date

Sold For: $14,500

---

Proof 197X-S Ike Dollar
Double Struck on 2 gram
Aluminum Shell Gas Token
PCGS PR 64
2 Known

Sold For: $13,500

---

Ike Dollar
Struck 40% Off-Center
On a Philippine 1 Piso Planchet
PCGS MS 64
UNIQUE

Sold For: $13,000

---

2023 $5 Gold Eagle
Struck on an Elliptical Planchet
3 Grams
NGC MS 69
UNIQUE

Sold For: $7,500