I am begining a journey of research and would appreciate input on a website, book, etc that would be an informative reference for these type stamps. Thanks! Jonathan
*** Moved by Staff to a more appropriate forum. ***
Flipacoin, a good start would always be a Scott catalog. If you do not have one, your local library might. For these stamps you do not need a brand new expensive catalog - a couple of years old one will do fine.
You show revenues, many with perfins, and a parcel post stamp. The Scott Specialized is a good start but will provide no help with the perfins. There is a US Perfin Catalog/Album available. Runs around $50-$75 for a used copy. Not sure about new ones.
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