1. Condition: The overall condition of the note is crucial in determining its value. Notes that are well-preserved, free from folds, tears, or stains are more valuable than those that are worn or damaged.
2. Serial Number: The serial number on a 1913 $20 Federal Reserve note can significantly influence its value. Certain serial numbers, such as low numbers or those with repeating digits, are considered more valuable and sought after by collectors.
3. Printing Location: The printing location indicated on the note, either "Washington, D.C.," or "New York," can also affect its value. Notes from specific printing locations can be rarer than others and thus command higher prices.
4. Year: The year 1913 is particularly significant for U.S. currency as it was the first year Federal Reserve notes were issued. This adds to the collectible value of a 1913 $20 note.
5. Signature Combination: The combination of signatures of the Secretary of the Treasury and the Federal Reserve Treasurer can also influence the note's value. Certain signatures are more desirable and considered more valuable than others.
Without seeing the actual note and assessing its specific characteristics, it is difficult to provide a precise value. If you have a 1913 $20 Federal Reserve note and want to determine its worth accurately, it is recommended to consult with a reputable coin or currency dealer or seek an appraisal from a professional numismatist.