The 1909-S Indian head cent is one of only two Indian cents with mintmarks. Additionally, it had the lowest mintage of the whole sequence, at just over a 3rd the mintage in the elusive 1877. Scan notes underneath UV-gentle. Most notes in circulation have functions, including watermarks or protection threads, https://lukaseeeky.onesmablog.com/the-greatest-guide-to-counterfeit-currency-for-sale-67537445