Where is the Mint Mark on a St. Gaudens $20 Double Eagle?

By GovMint :

The mint mark on a Saint-Gaudens Double Eagle, a $20 gold coin designed by Augustus Saint-Gaudens, is located on the obverse side. Specifically, you can find it just above the date, nestled between the sun's rays. This mint mark indicates where the coin was produced, with common marks including "D" for the Denver Mint and "S" for the San Francisco Mint. Coins minted in Philadelphia typically do not have a mint mark.

Sources Used:

https://www.coinworld.com/numismatic/collector-basics/start-your-collection/know-your-us-coins-saint-gaudens-twenty-dollar-double-eagle.html