Nice note but I don't think they were as fragile as you might think. The National Bank Note Company which printed these notes had been printing paper money for some time. Before the war this company printed bank notes for many state chartered banks and they did a good job. When they accepted the federal contract they upgraded the already pretty decent stock. I have this note and the $5 note and a $5 original charter (1865) National Bank Note, all three well circulated and in handling them it is obvious the paper used was substantial. In the condition your note is in I would not advise handling it to see this, but if viewers ever see this material in well circulated condition for sale at a coin shop or flea market and can get to handle it they will see and feel that it is pretty substantial paper. These notes circulated well into the 1870's and, as the Greenback Party demonstrated, they wanted more of them out there