Kennedy Half Dollar 40% Silver
Die Adjustment Strike
Double Struck



This certified but ungraded Kennedy half dollar was struck twice. The first strike was well centered but very soft. On the obverse, only the top of Kennedy's hair shows. The second strike is uniface obverse, and 50% off-center toward 6 o'clock and was softly struck. No date or mintmark is present but Kennedy half dollars were struck in 40% silver between 1965 and 1970. Although this could have been struck for a 1965-1967 Special Mint Set, it has Proof surfaces and was likely struck to be included in a San Francisco proof set from 1968 to 1970.

Proof coins are struck by technicians who hand feed the blanks into special presses. They are produced, examined and packaged using extreme quality control. It is very unusual to find major proof errors. A few broadstrikes, off-centers, double strikes (in collar) and off-metals have been known to be found in sealed proof sets. Proof errors are aggressively sought after by many error collectors.

A very small group of Proof errors recently came from a collection that was auctioned by the State of California. The U.S. Secret Service inspected and released this collection to the State of California determining that it was legal to own. The State of California then auctioned the collection and it has been dispersed since the sale.



Proof Errors are featured in chapter 21 of my
NLG Award winning book, World's Greatest Mint Errors: