The term "key-date" means a more valuable or scarce coin of the series. But the 1923 issue is not one of them.
There were no $2 bills printed with the date 1923. If you mean 1928, please see the Related Question for more information.
Do you mean, what's it worth? If the coin is in a collectible condition, retail values for circulated coins run from $30.00-$43.00.
If you mean a 1928 Peace dollar with No mint mark It's the key date to the series the value in VF-20 is $475.00. I suggest you take it to a coin dealer, because I have seen many 1928 S mint coins with the mint mark removed.
I assume you mean a silver certificate, not a dollar coin. Values range from $6 if worn, up to about $35 in near-new condition.
If you mean a 1921 high relief Peace dollar. Circulated coins are $125.00-180.00 Mint state coins start at $250.00
What does "binion" mean? It's not in any dictionary. If you have a regular Peace dollar, see this link:
Assuming you mean a 1923-S Peace dollar, a circulated example is $32.00-$39.00. Typical Mint State coins are $43.00-$55.00.
There were no $2 bills printed with the date 1923. If you mean 1928, please see the Related Question for more information.
It's the monogram of the designer Anthony de Francisci (AF). All Peace dollars have it.
Do you mean, what's it worth? If the coin is in a collectible condition, retail values for circulated coins run from $30.00-$43.00.
This is the designers initial.
If you mean a "Mintmark" it's a letter not a number and the 1922 Peace dollar is the highest mintage most common date of all Peace dollars, retail values are $16.00-$22.00 depending on the grade of the coin.
If you mean a real silver dollar, such as a Morgan or peace dollar the thickness is 2.4mm
If you mean the spelling if the word trvst, it's not a mistake all Peace dollars have this and the coin is only worth $16.00-$18.00 depending on how much wear the coin has.
If you mean the series date, it's 1934
If you mean one of the Sacagawea dollars or a Presidential dollar the date is on the edge of the coin and its not gold.
If you mean the dual-date 1776-1976 dollar it's Eisenhower.