The concept of selective coin collecting accepts that for most collectors, one’s budget, space and ability to understand a collecting area in depth are limited.

A die clash occurs when minimum die clearance drops to zero and the dies collide when a planchet fails to be fed into the striking chamber.

At a June 28 GreatCollections.com sale, a PCGS-graded Specimen 68 Deep Cameo 1966 Kennedy half dollar from a Special Mint set sold for $14,850.

Prior to 1990, Mint marks were hand punched into working dies, sometimes more than once, using a hand-held punch and a mallet.

With a mintage of just 16,000 circulation strikes, the 1880 Shield 5-cent coin is the key to the series.

Uncertainty continues to surround the fate of the Langbord family’s 10 1933 Saint-Gaudens double eagles.

This year’s Summer FUN show, held July 9 to 11 in Orlando, marked the ninth installment, and its U.S. coin auctions by Heritage Auctions brought $8.3 million.

The Coin Dealer Newsletter family of U.S. coin and paper money pricing publications is under new ownership, John Feigenbaum confirms.

Also this week, American Eagle silver bullion coin sales reached 1,323,500 coins in a single day, July 27, after a two-week moratorium on sales.

The United States Mint took orders July 30 for more than 30,000 2015-W American Liberty, High Relief $100 gold coins within 75 minutes.

This year’s Summer FUN show, held July 9 to 11 in Orlando, marked the ninth installment, and its U.S. coin auctions by Heritage Auctions brought $8.3 million.

The most recent big U.S. Mint release was the Harry Truman Coin and Chronicles Set with a Reverse Proof Presidential dollar, which sold out in 15 minutes.

The price of the 2015-W American Liberty, High Relief gold $100 coin when it debuts at noon Eastern Daylight Time July 30 will be $1,490.

When the 2015 Coin and Chronicles Set - John F. Kennedy goes on sale Sept. 15, collectors will have twice as many sets as planned available to purchase.

This year’s Summer FUN show, held July 9 to 11 in Orlando, marked the ninth installment, and its U.S. coin auctions by Heritage Auctions brought $8.3 million.

The Smithsonian's new "Value of Money" exhibit, which officially opened July 15, includes more than 400 objects, thematically grouped in five sections.

When the American Liberty, High Relief coin was just an idea, U.S. Mint technical staff were tasked with determining the viability of striking the coin.

The following was released July 28 by the U.S. Mint concerning the Aug. 24 release of the 2015 American $1 Coin and Currency Set.

Rotational machine doubling is caused by an unstable die rotating around a central axis after the initial impact.

This week I discuss gold $2.50 quarter eagles from 1834 to 1839 — the Classic Head series.

The Guardian reported on the Royal Mint's rising profits in a recent article online. Coin World has that story and more in its latest Buzz report.

Winston Zack, Louis Scuderi and Michael Sherrill announce a new Bust dime book that will be available at ANA.

National Numismatic Collection has grown from Smithson's first 10,000 gold sovereigns, assisted by many donations including several from Stack family.

We like to ask Coin World Facebook fans to share about the numismatic acquisitions they've made recently.

"The Value of Money" exhibit provides a broad view of numismatics, with objects spanning more than 2,600 years.

It may surprise you to learn that I find Proof coins in Kennedy half dollar rolls on a fairly regular basis.

One of the initial steps in the authentication process is to determine if a given coin is worth enough to attract the attention of a counterfeiter.

Coin World is looking back at its five most-read stories of the week, according to reader metrics.

Collectors of Proof American Eagle platinum coins are a small but zealous group, attracted by the annually changing design on the reverse.

Numismatist Sheridan Downey's 96-lot mail-bid sale closing Aug. 12 features United States Flowing Hair, Draped Bust and Capped Bust half dollars, and two dimes.

Coins to honor sites in Illinois, Kentucky, West Virginia, North Dakota and South Carolina.

The official launch ceremony for the 2015 Saratoga National Historical Park quarter dollar in New York is scheduled for Nov. 17 in Schuylerville, N.Y.

Whitman Publishing releases first edition of Bowers' book on Mercury dimes, Standing Liberty quarters, and Walking Liberty half dollars.

Longtime numismatist John D. Wright will be honored with the American Numismatic Association’s 2015 Lifetime Achievement Award.

Following my columns on early American gold coins, this week I discuss gold dollars.

Also this week, a Peace dollar got a price boost from its slab, and Ben Bernanke sounded off on the idea that Alexander Hamilton could be taken off the $10.

Shane Downing, editor and publisher of Coin Dealer Newsletter, died June 18 at age 47 while battling colon cancer.

The U.S. Mint established a 50 unit household ordering limit for the 2015-W American Liberty, High Relief $100 gold coin.

Also today, the United States Mint today announced the release of MyUSMint, the bureau's new mobile application for Android, iPhone and iPod Touch.

The United States Mint has released MyUSMint, the bureau's new mobile application (app) for AndroidTM, iPhone®and iPod touch®.

"Appraising Your Coin Collection," an online book just released by numismatic author Kevin Flynn, is available free online to collectors.

Coin World Editor-at-Large Steve Roach is in Washington D.C. Wednesday live-tweeting a morning at the Smithsonian's National Numismatic Collection.

An older green-label PCGS sample slab that contains a lustrous 1964-D Roosevelt dime graded MS-64 sold for a bid of $5 on GreatCollections.com.

Two superb sets from The Bob Simpson U.S. Pattern Collection will be displayed at the PCGS booth during the World's Fair of Money Aug. 11 to 15.

Sales of Proof and Uncirculated 2015-W Claudia "Lady Bird" Johnson, First Spouse gold $10 coins are scheduled to go on sale at noon Eastern Time Aug. 27.

An 1896 Barber dime, an 1896 Educational $1 note and an interesting pair of earrings with a coin angle among the purchases made by Coin World Facebook fans.

In a June 3 eBay sale, a 1922 Peace dollar in a Numismatic Guaranty Corp. sample slab graded Mint State 60 sold for $208.99.

Carlton Frederick “Fred” Schwan, coin collector and paper money expert, is the American Numismatic Association’s 2015 Numismatist of the Year.

Complete details about its first mobile app for iOS and Android phones are to be released July 15 by the U.S. Mint.

The gold coins minted from 1795 into early 1834 were worth more in melt value than the denominations they represented.

United States Mint officials decided July 13 that the bureau will not produce and issue the American Liberty, High Relief silver medal in 2015.

Scotsman Auction Co.’s 2015 Midwest Summer Sale is set for Friday, July 24, at the Saint Charles, Mo., Convention Center.

Two State quarter dollars made their closest approach to the dwarf planet Pluto on July 14.

The 2015 United States Mint Presidential $1 Coin Uncirculated Set will be available for purchase starting on July 21 at noon Eastern Daylight Time (EDT).

The American Numismatic Association is providing an Advanced Numismatic Negotiating course in conjunction with its World's Fair of Money.

Longtime career promoter Donn Pearlman has been selected as the recipient of the American Numismatic Association's Farran Zerbe Memorial Award for 2015.

The pricing grid the U.S. Mint will use to determine the July 30 sales price for the 2015-W American Liberty, High Relief $100 gold coin was announced July 13.

An example of a 1936 Lincoln, Doubled Die Obverse cent is offered in Heritage Auctions' upcoming ANA convention auction.

The U.S. Mint could produce the nation's first "pink" coin if revised legislation authorizing three Breast Cancer Awareness coins for 2018 is approved.

The Combined Organizations of Numismatic Error Collectors of America is issuing a one-ounce silver bar imagining a 2015 Lincoln, Double Die cent.

W. David Perkins will be offering for sale the Kirk Gorman Reference Collection of Capped Bust Dimes 1809-1837 beginning in January.

CCAC teleconference Aug. 11 at 1:00 p.m. Eastern to review Mint's revised reverse design proposals for Nancy Reagan First Spouse gold $10 coin, bronze medal.

President Obama will nominate U.S. Mint Principal Deputy Director Matthew Rhett Jeppson as 39th director of the U.S. Mint, the White House announced July 9.

In The E-Gobrecht, numismatist Paul Kluth examines a 19th century oak box that may have been used to transport dies from the Philadelphia Mint.

One of the chief distinguishing characteristics of the Colonial coin specialty is the sense of community it engenders.

House Banking Consumer Affairs and Coinage Subcommittee Chairman Frank D. Annunzio was critical of designs chosen for Los Angeles Olympic commemorative coins.

The government contends that it should not be prevented from recovering coins from “the family of a thief” in its latest filing.

The Morgan dollar was rushed into production after passage of the Bland-Allison Act on Feb. 28, 1878.

1880 to 1882 Morgan dollars from the San Francisco Mint are often seen in high grades, with bold strikes, booming luster and overall terrific eye appeal.

Oct. 8 will be Gary Marks’ last Citizens Coinage Advisory Committee meeting as a member.

The product includes two Kennedy Presidential $1 Coins from the first day of production at the bureau’s Denver and Philadelphia facilities.

Sales for neither the 2015 Coin & Chronicles Set - Dwight D. Eisenhower nor the 2015-W American Liberty, High Relief gold $100 coin will launch during ANA show.

The 2015-W American Liberty gold coin will be struck three times, on custom planchets.

This 1885 Morgan dollar graded Professional Coin Grading Service MS-68+ with a green Certified Acceptance Corp. sticker sold for a healthy $39,950.

Two of collector and numismatic author David Cassel’s collections will be offered by Heritage Auctions in August.

The first United States gold coins were minted in 1795 in the form of $5 and $10 coins called half eagles and eagles. Quarter eagles made their debut in 1796.

Increased investment demand forced the U.S. Mint to temporary suspend sales July 7 to its authorized purchasers of 2015 American Eagle silver bullion coins.

The fourth of five installments by numismatist David Finkelstein concerning the production workflow of the First U.S. Mint is in the July 5 JR Newsletter.

The Top Morgan Dollar Varieties, An Advancement of Knowledge, by Kevin Flynn is now available.

GreatCollections is pleased to announce the auction date of the Hawaii 5-0 VAM Collection, which will be offered on July 26, 2015.

The Coronet Collection’s PCGS MS-68+ example with a green Certified Acceptance Corp. sticker indicating quality within the grade is the finest known.

The Central States Numismatic Society has issued collectible, commemorative advertising tokens to announce its 2016 show in Schaumburg, Ill.

A bulk discount purchasing option for dealers was not in effect for the Proof and Uncirculated 2015-W Jacqueline Kennedy, First Spouse $10 gold coins.

Annual United States Mint Proof sets have a long tradition as gifts for a birth in one’s immediate family, extended family, or that of a close friend.

The American Numismatic Association has chosen three new candidates and six incumbents to serve on the ANA Board of Governors for the 2015-17 election term.

The Boys Town Centennial Commemorative Coin Act was signed into law by President Barack Obama on July 6, authorizing the second 2017 commemorative coin program.

The U.S. Mint announced July 6 the bureau will resume sales of the 2015 Blue Ridge Parkway 3-inch silver bullion quarter dollars July 13.

An anonymous donor has once again donated a valuable gold coin to help finance Fourth of July fireworks in the town of Zelienople, Pa.

Aug. 13 reception in Rosemont at ANA World’s Fair of Money, will honor late ICTA industry affairs director.

Firm purchases German, Dutch stamp and coin collector product lines; view online July 15.

Nova Constellatio patterns among earliest U.S. coins

The William M. Rosenblum mail-bid auction of the Philadelphia Collection closing on July 16 features a selection of seldom seen Israel paper money.

With the stroke of a pen in 1964, President Lyndon B. Johnson made the major legislative step toward civil rights for all Americans.

As the Greater Jacksonville Coin Club in Florida nears its 70th anniversary in 2017, it has issued a medal to commemorate recent accomplishments.

Sales will open for the 2015 United States Mint Presidential $1 Coin & First Spouse Medal Set – John F. Kennedy on July 9 at noon Eastern Daylight Time.

Also this week, a 1970-S Lincoln, Small Date cent was discovered in a roll, and the Proof Jackie Kennedy First Spouse coins went quickly.

What the country needs is a good 2½-cent piece — at least that's what the Mint said in 1916.

An unconfined planchet that is perfectly centered when struck becomes an oversized coin known as a broadstrike, sometimes called a “centered broadstrike.”

The composition of the nation’s regular 90 percent silver coins and 90 percent commemorative silver dollars could change under legislation.

Just how “deluxe” have editors Ken Bressett, Q. David Bowers, and Jeff Garrett made A Guide Book of United States Coins: Deluxe Edition, the beloved “Red Book”?

Los Angeles Dodgers second baseman Jack Roosevelt "Jackie" Robinson broke the modern-day color barrier in Major League Baseball in 1947.

Coin World gives you a quick look at what's happening in the world of numismatics.

U.S. Representatives Carolyn B. Maloney, D-N.Y., and Pete Sessions, R-Texas, introduced in the U.S. House the Breast Cancer Awareness Commemorative Coin Act.

The 2015 Coin and Chronicles Set – Harry S. Truman reportedly sold out of its maximum authorization within 15 minutes of going on sale June 30.

Sales by the U.S. Mint of American Eagle silver bullion coins totaled 4,840,000 ounces in June 2015, up from 2,023,500 ounces in May.

The Proof 2015-W Jacqueline Kennedy, First Spouse gold $10 coin went on immediate back-order soon after going on sale June 25.

This 'black and white' feature is specific to 1950 variations of this coin and beyond.

A 1967 Kennedy half dollar and a 1921-D 'Mercury' dime are also among the recent purchases reported by Coin World's Facebook fans.

Thomas Edison's many inventions helped create the modern world in which we live, so it is only natural that he is honored on a collector coin.