"O" (New Orleans)
"S" (San Francisco)
"CC" (Carson City)
"D" (Denver)
If the coin has no mint mark, then assume it was minted in Phiadelphia
You'll need to check its condition and mint mark. This page shows a range of values.
A $2.50 gold piece minted from 1796 through 1807 weighed 4.37 grams and was 91.67% gold. One minted from 1808 through 1929 weighed 4.18 grams and was 90% gold.
Check that coin again. The US never minted a $25 gold piece, and the last year for gold coinage was 1932.
The value is for gold weight only
The US five dollar gold piece was first minted in 1795. There were many designs. The most common designs were the Liberty Head Type (1839-1908) and Indian Head Type (1908-1929).
A $25 gold piece is called a Gold American Eagle. These were first minted in 1986 and have been minted each year since then. The values for these coins range from $480 to $600 depending upon the year of mintage and actual condition of the coin.
The $2.50 gold piece was minted from 1796 through 1929. It is necessary to know the date of the coin before a reasonable estimate of value can be given.
$5 gold pieces minted from 1795 through 1829 were 25mm in diameter. $5 gold pieces minted from 1829 through 1834 were 23.8mm in diameter. $5 gold pieces minted from 1834 through 1866 were 22.5mm in diameter. $5 gold pieces minted from 1866 through 1929 were 21.6mm in diameter. $5 gold pieces minted from 1986 through 2009 were 16.5mm in diameter.
What is a U.S. 1906 uncirulated in mint condition 2.50 gold piecein protective plastic container worth?
No. The largest denomination of gold coin the US ever minted was the $20 double eagle (eagle being the term for a $10 coin).
It would have been minted in Dahlonega,Georgia.
No silver or gold 1 dollar coins were struck in 1933