This font style includes a lot of beneficial ligatures, and by typing 'N', 'r' and period plus triggering the discretionary ligatures you get an oldstyle numbersign. As normal in my blackletter font styles, the # secret is occupied by the round s.
Font Family: Emilia Gotisch
Tags: blackletter, fraktur, german, gothic, gotisch, great x-height, long s, medieval, vintage, weiss