I purchased a bunch of stamps at an estate sale recently, and for the most part can find and list the stamp do not keep for sale. I came across a set unused stamps that have a faint crown on the rear, and cannot find that on any listing of same stamp. I was wondering if this is an imprint from sitting on another stamp, or do I have something unique. Their is a piece of wax paper that was used to prevent glue from adhering to the paper in the auction, that is what you see I one of the image. I am admittingly a novice collector so any feedback is appreciated. :-)
Thank you
Patrick

*** Moved by Staff to a more appropriate forum. ***