@jkelley01938: Thanks. However, my search fu must be lacking as all I found on the USSS site was a single research paper (#12) on Liberty Series precancels.
There is a lot of info on USSS' "The Bureau Specialist". For example, Volume XXXIX, #10 (October, 1958) has a one page write-up on the $.25 stamp Paul Revere. You may have to be a member (nominal cost an worth every dime) to view these bulletins.
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Stamp Community assumes no liability for errors. Copyright 2005 - 2026 Stamp Community Family - All rights reserved worldwide. Use of any images or content on this website without prior written permission of Stamp Community or the original lender is strictly prohibited. Privacy Policy / Terms of UseAdvertise Here