Posted 08/13/2019 6:17 pm
I think it is showing the doubling on the R, and they are saying you can use the notch were the normal device meets the doubled R(it sticks out to the right at a 90degreeish angle) to help distinguish it from damage. The lower arrow is pointing to lines that would be visible on other coins made with this die(the name of which I cannot remember) that use can also use as a marker.
