I also brought a pair of somewhat mysterious Maryland scrip items: 50¢ and $1 National Savings Systems "cash savings checks" issued by the Cumberland Savings Bank of Maryland. The notes are copyrighted 1915 by the National Savings Systems Company of Harrisburg, PA and bear interest up to July 1918. I have so far not seen any other items like these, nor have I been able to find any more info on National Savings Systems. I brought them since there were a few Maryland numismatists present, but no one seems to have seen anything like them. Anyone else seen these things before? Did they function like Postal Savings System certificates from roughly the same era?