More information is needed - date, design, and condition would be helpful.
1928
United States of America A68238372A Michael Hillegas $10 gold certificate
gold seal and numbers
Reverse: green gold certificate
series 1922, circulated
Not every old bill is automatically a certificate so it's important to check carefully. If it has a gold seal and says "Gold Certificate", see the question "What is the value of a 1928 US 10 dollar gold certificate?" for values. If it has a green seal and says "Federal Reserve Note", it's not a certificate, it's a Federal Reserve Note. See the question "What is the value of a 1928 US 10 dollar Federal Reserve Note?" for values.
Very definitely. 1922 gold certificates were printed in denominations of $10, $20, $50, $100, $500, and $1000. For more information please see "What is the value of a 1922 US 20 dollar gold certificate?"
$85 retail if worn, up to about $225 if in nearly-new condition.
1928-series $100 bills weren't issued as silver certificates, only gold certificates and Federal Reserve Notes. Please look at the bill's front to determine which you have; then check one of the following: "What is the value of a 1928 US 100 dollar Federal Reserve Note?" "What is the value of a 1928 US 100 dollar gold certificate?"
Please don't assume that every old bill has to be a silver certificate. 1928 $10 bills were issued as gold certificates with gold seals and as Federal Reserve Notes, with the familiar green seal and the words "Federal Reserve Note" across the top.Please check the bill's seal color and wording across your bill's top front; then see one of the following questions:"What is the value of a 1928 US 10 dollar Federal Reserve Note?""What is the value of a 1928 US 10 dollar gold certificate?"
The United States did not print a 1915 $10,000 gold certificate.
Please check your bill again. As the banner across the top indicates, it's a silver certificate, not gold. All gold certificates were withdrawn in 1933. There's more information at the question "What is the value of a 1957 US 1 dollar silver certificate?"
Not every old bill is automatically a certificate so it's important to check carefully. If it has a gold seal and says "Gold Certificate", see the question "What is the value of a 1928 US 10 dollar gold certificate?" for values. If it has a green seal and says "Federal Reserve Note", it's not a certificate, it's a Federal Reserve Note. See the question "What is the value of a 1928 US 10 dollar Federal Reserve Note?" for values.
Yes. The 1928 series was the last for circulating gold certificates, and $10 was the lowest denomination. There's more information at the question "What is the value of a 1928 US 10 dollar gold certificate?"
As of today about $250.00
The value of the US dollar is not based on gold. However at today's gold prices, one dollar will buy about 0.011 pennyweights of gold.
Very definitely. 1922 gold certificates were printed in denominations of $10, $20, $50, $100, $500, and $1000. For more information please see "What is the value of a 1922 US 20 dollar gold certificate?"
Your bill is most likely a 1905 $20 gold certificate. If correct, please see the question "What is the value of a 1905 US $20 gold certificate?" for more information.
Please check the banner across the top of your bill. It should say United States Note, not gold certificate. There's never been a $2 Gold Certificate and in any case, all gold certificates of any denominations were withdrawn from circulation in 1933. There's more information the at question "What is the value of a 1963 US 2 dollar bill?".
The spot price of gold right now is $1,085.50oz so value as of today about $1.025.00
$100 to $110 at today's gold prices
Any red-seal US $2 bill dated 1928 or later is a United States Note and not a certificate. Certificates were exchangeable for silver or gold, and carried the words Silver Certificate or Gold Certificate across the top. Please see the question "What is the value of a (date) US 2 dollar bill?" for more information, where (date) is your bill's series date.