What you have is a common error called a filled die error. It happens when some grease or crud gets into the little recesses in a die used to strike a coin and prevents the metal from flowing properly. Filled die errors happen so often that they're not normally considered to have any extra value.
It's still worth 50 cents, the dates stamped into the coin adds nothing to the value.
The U.S. Mint has never made a "Memorial" Kennedy half dollar. Many different society's have counter stamped & gold plated Kennedy half dollars an sold them as "Memorial" coins. The coins are considered altered and have no numismatic value.
The face value of a 1976 Bicentennial half dollar is fifty cents.To clear things up:- The date is 1776-1976. These coins were struck in both 1975 and 1976 to honor the Bicentennial. All carry the same dual date.- ALL Kennedy halves have JFK's portrait, that's why they're called Kennedy halves, LOL!- Coins are said to be struck or minted, not "stamped"- The front of the coin is called the "obverse". That's the "heads" side for American coins so you would expect the portrait to be there. The back is called the "reverse"Those items out of the way, there were so many of these coins minted and saved that anything you find in circulation will only be worth 50 cents. If the coin is in uncirculated or proof condition it might be worth a couple of bucks.
Lincoln cents with Kennedy's face counter stamped on them are novelty coins that have no numismatic value at all. Many different dates and mintmarks exist, but they are still only face value.
JFK half dollars were first issued in 1964. And 1963 is the last year for Franklin half dollars, plus the US Mint has never issued a gold JFK coin of any type. If the coin is a counter stamped, gold plated Kennedy half dollar it's only 50 cents.
There isn't one.
It's been altered after it was minted. No extra value.
It's still worth 50 cents, the dates stamped into the coin adds nothing to the value.
The U.S. Mint has never made a "Memorial" Kennedy half dollar. Many different society's have counter stamped & gold plated Kennedy half dollars an sold them as "Memorial" coins. The coins are considered altered and have no numismatic value.
It is Sterling Silver.
The missing '0' is generally caused by a foreign substance (like machine grease) getting into the die, preventing the full striking of the coin. This happens more often than you might think. Its value is a dollar or less.
Eventually it will come back to you stamped with a note saying postage missing.
If the case is not stamped with the manufacture, there's a good chance your not going to know for sure. Major manufactures stamped their leather, if where the stamp was is missing it MIGHT be identified by sight.
The face value of a 1976 Bicentennial half dollar is fifty cents.To clear things up:- The date is 1776-1976. These coins were struck in both 1975 and 1976 to honor the Bicentennial. All carry the same dual date.- ALL Kennedy halves have JFK's portrait, that's why they're called Kennedy halves, LOL!- Coins are said to be struck or minted, not "stamped"- The front of the coin is called the "obverse". That's the "heads" side for American coins so you would expect the portrait to be there. The back is called the "reverse"Those items out of the way, there were so many of these coins minted and saved that anything you find in circulation will only be worth 50 cents. If the coin is in uncirculated or proof condition it might be worth a couple of bucks.
Lincoln cents with Kennedy's face counter stamped on them are novelty coins that have no numismatic value at all. Many different dates and mintmarks exist, but they are still only face value.
JFK half dollars were first issued in 1964. And 1963 is the last year for Franklin half dollars, plus the US Mint has never issued a gold JFK coin of any type. If the coin is a counter stamped, gold plated Kennedy half dollar it's only 50 cents.
The U.S. Mint has made no commemorative coins of any type for JFK. Many gold plated and counter stamped Kennedy Half's exist and are considered novelty coins that have no collectible value.