On the modern sequence bills, the microprinting can be found on Franklin's collar, the bottom of Franklin's portrait, and to the right with the brown quill. Microprinting was to start with included on the $100 bill in 1990. I exploit the normal or collector grading described in Gathering Confederate Paper https://raymondfzpfv.shotblogs.com/the-smart-trick-of-copyright-trade-dollars-for-sale-that-nobody-is-discussing-47753106