The weight of a 1908 Double Eagle is 33.436 grams. AGW is .96750oz of pure gold
The standard weight is 33.4 gm for an unworn $20 coin issued from 1849 to 1932.
There is no such thing as an Eisenhower half dollar, only an Eisenhower dollar coin.
It's a Half Dollar NOT a dollar coin. The coin weighs 12.50 grams and contains .36169oz of pure silver.
A circulating copper-clad Ike dollar weighs 22.68 grams (or slightly less if it's visibly worn).
Modern brass and older SBA $1 coins weigh 8.1 gm. Copper-nickel Eisenhower dollars weigh 22.7 gm True silver dollars (those made up till 1935) weigh 26.7 gm
1848. Silver. Twenty. Dollar. Coin
The British do not have a Twenty Dollar coin.
The denomination of the gold McKinley Memorial coin is One Dollar not Twenty. Value is $700.00-$800.00
A 1908 Saint-Gaudens $20 Double Eagle coin with no motto on reverse in a mint state of AU-50 is worth: $975.00; if this coin does have the motto on revese, its value in a mint state of AU-50 is also: $975.00.
Go to any coin shop or coin show.
The best way to do that is to take it to a coin collector.
There is only ONE U.S. 1849 Twenty Dollar (Double Eagle) gold coin. It's a national treasure that is in the Smithsonian collection. The coin is priceless.
Please look at the coin again, the US did not coin $25 dollar denominations in 1896.
Both
4000.00
An 1891 dollar coin is a Morgan dollar, and therefore should weigh 26.73 grams. (This is the official weight when issued from the mint. If the coin was substantially circulated, it may weigh less due to wear.)
If you mean a $2.50 Gold coin dated 1908 retail values for a circulated coin are $185.00-$250.00 with uncirculated at $350.00+