To set things straight and so that you can find your coin when doing searches, that's ST GAUDENS and NO MOTTO.
Numismedia lists a retail fair market value of an MS66 no-motto St. Gaudens double eagle at roughly $3800 for a Philadelphia coin, and 10 times that for a Denver coin.
In any case you need to be sure that your coin has been certified by one of the major grading services. MS66 is a stratospheric level for a coin and only a trained expert can assign that grade reliably.
A 1923 $20 Gold Coin - aka - Saint-Gaudens Double Eagle - in a mint state of MS63 is worth: $1500.
Saint Gaudens, High Relief, Roman Numerals, no motto 1907 is worth upwards of $30,000
The Liberty Dollar is worth One Dollar!
It's worth one dollar.
The Canadian Dollar is worth the most.
Yes, a penny is worth 1/100 of a dollar, a nickel is worth 1/20 of a dollar, a dime is worth 1/10 of a dollar, and a quarter is worth 1/4 of a dollar!
A US dollar is worth 0.9822561 of a dollar in Europe
Values depending on grade for circulated 1915 Saint-Gaudens are $1,340.00-$1,710.00 uncirculated examples start at $1,770.00
At the time, it was worth one dollar.
Dollar bills are not always worth one dollar, however one dollar bills are worth one dollar for the sake that 1=1, it is a one dollar bill, and can be exchanged for goods and services.
1 Australian dollar is worth 1.06 Dollar in US
A dollar.