Roosevelt Dimes ?

The one on the right is a normal coin. It is off centered a little but well within tolerance. The one on the left is a slightly misaligned die if the reverse is centered. To command a premium it should be off enough that part of the letters are missing. This one isn't off enough to go into the letters yet.

When comparing size of devices on coins, always best to compare from the same year. The only exception to that rule would be the large/small dates. Also the Wide/close AM would also be an exception. But changes happen to some coins yearly, others in several years.

Bill

So an off-center strike can't occur unless the collar was missing during the strike?

Coop said: "When comparing size of devices on coins, always best to compare from the same year. The only exception to that rule would be the large/small dates. Also the Wide/close AM would also be an exception. But changes happen to some coins yearly, others in several years."

I am going to add that I am working on a circulation strike dime now that has different reverse designs:-) They are minted in the same year. I don't want to divulge the date yet until I do some further study on the two coins. I am not sure yet if this is a mid-year design change or a proof die that got used for circulation strikes. In any case, the reverses are vastly different.

A couple of points would be that coop is 1000% correct when he says to check coins of the same year to determine if there might be a design change that would constitute a sub-type or variety. Coins of different dates can be like comparing apples to pomegranates:-) They can both be round and red but everything else is different:-)

The next point would be, to be open to any possibility especially with Roosevelt dimes. There needs to be more work done on the series of Roosevelt dimes. I'm betting there could be more interesting stuff to be found.

Thanks,
Bill

Hi,

Some might disagree with the terminology being used. This is my understanding:

A centered-broadstrike would be a coin that is struck centered, with no collar that becomes oversized with respect to it's diameter due to the metal filling the void created by the missing collar during a malfunction involving the collar.

Off-centered broadstrike is a term that is not used. (At least it shouldn't be) The coin is struck without the collar engaged but is in the coining chamber so the planchet is really not off centered during the strike.

An off-center struck coin is simply that, struck without a collar with the entire planchet not contained within the coining chamber.

There are different types of collars used. Some are complete rings that are down inside the coining chamber. ( I am not sure of the collar's position relative to the anvil die) They are 5/1000ths of an inch larger than the die. The planchet is fed (there are two types of feeder mechanisms depending upon the presses used) (one uses feeder fingers others use a ring type of feeder)into the coining chamber. Anyway, the planchet is struck and is ejected from the coining chamber by a movement of the anvil die, controlled by a cam the newly struck coin is pushed up past the collar and released. The reeding, if a part of the collar is imparted to a coin during the strike.

Another type of collar , like the ones used on Proof Presidential dollars is in segments and actually surrounds the edge of the coin during the strike and that imparts the details from the collar to the coin.

If I left something unanswered, just narrow it down to another question:-)

Thanks,
Bill

Cool video Coop - thanks for sharing. I wish it showed more detail on the striking though. I'd specifically like to see how the collar comes into play.