$20
Sometimes, for various reasons, the die used to make the coin has a double image on it and thus, shows on all of the coins struck by it. In other instances worn machines will cause the die to "bounce" when it strikes the coin blank leaving a slight double image call "machine doubling".
FG are the initials of Frank Gasparro, who designed the Lincoln Memorial reverse.
To look and quickly look again.
reverse programe in fox pro
It means, Double Die Reverse
If you mean a Rotated Reverse Die? No this is not common.
$20
Im going to the coin show to find out. I have a 1969 d reverse double die penny. the doubling is amazing 60-70% of the back
Not if it is a modern coin. Modern coin minting equipment has the obverse (heads) and the reverse (Tails) dies "keyed" meaning that you can't insert an obverse die where the reverse die goes and vice versa. Because of it, it is impossible to have what most people think of a double headed coin. It is however possible to have what is known as a "Brockage" error where a coin gets stuck to the die and then the coin acts as a die for the next coin. This would mean that a coin could have 2 heads, but one side would be a reverse image of the other side.
In some cases, a double die adds to the value of a coin but in other cases it does not. Whether or not the value increases by the presence of a double die is determined simply by the market demand for them. For this Kennedy half I find the value in uncirculated condition to be about $18.
A double arrow in a chemical reaction indicates that the reaction is reversible, meaning it can proceed in both the forward and reverse directions. The reaction can reach an equilibrium where the forward and reverse reactions occur at the same rate.
Its not in reverse gear.
The Mask - 1995 Double Reverse 1-8 was released on: USA: 23 September 1995
if anyone has touched it then it is worth 1 cent. in uncirculated condition, 0.30$, in uncirculated condition with double die reverse, 300$. With D mint mark; same, no double die specimens known. With S mint mark; only proof =3$
Well, all "dramatic" means is that its easier to see than some doubled dies. Since by nature a doubled die will be the same on all coins that have been struck by that particular die, it doesn't mean that this example of X year's quarter's double die is better than other examples of the same year, merely that the doubling of this particular die variety is easier to see than others. Some coins have dramatic doubled dies such as the 1955 wheat penny doubled die which is easy to see with the naked eye, while others such as the 1943-P nickel doubled die is much harder to see and generally requires magnification to appreciate.
I'm confused, do you mean when you are going in reverse or turning the engine over in reverse direction?