Bureau of Engraving and Printing
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ekornberg
I have a 3 cent Washington offset stamp that should be violet. It is green!!! The experts say it is a changeling since no other color variety of this stamp is known. I am willing to accept there opinion. But no one has been able to explain to me how a stamp goes from violet to green by environmental or chemical means. Can you tell me.
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replied to:  ekornberg
morri
Replied to:  I have a 3 cent Washington offset stamp that should be...
Wow, I don't know, what happened to it?
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