There's no such coin. At the time, an "eagle" was a $10 gold piece. There were $20 coins called double eagles, but never a $25 coin.
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what is the value of a 1924 St. Gaudens Double Eagle gold coin
Only one size of the 1924 Double Eagle was struck by the US Mint.
2 dollar and fifty cent
2.79mm is the nominal thickness of the 1924 Saint-Gaudens $20.00 double eagle.
2000-2500 USD or so
If you are in possession of a 1924 Saint-Gaudens $20 Double Eagle gold coin, its value in extra-fine condition (EF-40) is: $1225.00.
$100 to $110 at today's gold prices
5000.00
Gold Eagle Six-pence (half-piece)
No. The largest denomination of gold coin the US ever minted was the $20 double eagle (eagle being the term for a $10 coin).
The 1875 Double Eagle is made from 90% gold & 10% copper.
That's west point. More than the gold weight. Portably retail 350-500