"The $25 has a large "PAULSON" and the $5 has a large hat&cane. The older $25 has a small "PAULSON" and the older $5 has a small hat&cane. The older and newer $1s do not have specific UV markings but the blue inserts fluoresce quite differently. I thought this was very interesting because otherwise there is no discernible difference I can find between the older and newer chips."
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