1999 Connecticut Quarter

I think when the devices look really flattened out it is DDD.

Yep VLDS

This is a combo issue. It is DDD and also Machine Doubling. (More than one thing can happen on a coin) This one had a very worn die issue and after the strike the machine altered the coin with Machine Doubling. Note how all the devices looked like they were mashed potatoes. But as these dies ages they continue to get worse until they are retired.

Machine Doubling can be in any direction, single or many directions. (A loose machine does what it is allowed by the looseness of the machine)
Die wear (This one being a single squeeze die, DDD issue) will always move towards the outside edge of the die. Why? Metal movement during the strike. Planchets are slightly smaller than coins. They drop into the collar and struck and they planchet becomes a coin. On the ones with reeded edgea and flat on other coins. But the whole coin expands and forms to the shape of the collar. So the metal all moves in a single direction. A soon as the coin is struck the die drops and the feeder fingers remove the coin from the chamber.


Thus the metal movement is always in the same direction, the dies will always show wear in that direction. Thus they will wear in a certain pattern.

CoopHome: How is die wear on seen on coins? always altering the dies in a wear pattern towards the out rim direction.