Despite its age, the average 1969 US $20 bill has little or no collector value unless it's in crisp uncirculated condition. Too many were printed for them to be scarce.
As of 02/2010 uncirculated ones retail for $25 and up. Also, if it has an unusual serial number (e.g. 12345678 or 12121212) it would be of interest to niche collectors.
As of 09/2008 auction prices are around $24.
The U.S. did not issue silver certificates with that denomination in 1934. For values of 1934 Federal Reserve Notes visit: http://www.uscurrencyauctions.com/$20notes.htm
Please check your bill's date and post a new, separate question. A bank name would appear on a 1929 National Bank Note. 1928-series bills were either Federal Reserve Notes or gold certificates.
Twenty
President Andrew Jackson is on the face of the twenty-dollar bill. President Andrew Jackson first appeared on the twenty-dollar bill in 1928.
The value of a 1928 twenty dollar bill that says "The Federal Reserve Missouri Bank of St. Louis" would actually depend on a number of things. The main factor that should be considered when determining value would be the condition of the bill.
$12 to $15, assuming average wear.
As of 09/2008 auction prices are around $24.
Assuming it has a brown seal and is labelled "National Currency", your bill is worth $25 to $35 retail.
Assuming it has a brown seal and says National Currency, about $25-35 depending on condition.
The issuing district on a twenty dollar bill can be found by looking at the first letter of the serial number on the bill. Different letters correspond to different Federal Reserve Banks, which are located in various cities across the United States.
Alan Greenspan served as Chairman of the Federal Reserve from 1987 to 2006. Ben Bernanke served as Chairman of the Federal Reserve from 2006 to 2014.
The U.S. did not issue silver certificates with that denomination in 1934. For values of 1934 Federal Reserve Notes visit: http://www.uscurrencyauctions.com/$20notes.htm
Ben Bernanke
This is a Federal Reserve note and should have a green seal. They are worth $22-$30 in circulated condition and $40 or more in uncirculated condition.
Prices as of 07/2008 From Dallas: $40.-$65. From San Francisco: $40.-$125 From any other Federal Reserve district : $25.-$35.
The Reserve Bank of Australia advises that there are approximately 132,600,000 Australian Twenty Dollar notes in circulation as at 30th of June, 2009.