I have a $20 US bill stamped with HAWAII on the front and back. They were issued during WW2 and used only in Hawaii and if the Japanese invaded the island, and broke into the banks and stole the currency, the Fed could de-certify all of the cash.
https://en.wikipedia.org/wiki/Hawaii_overprint_note
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Glen
50 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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