I was detecting a particular spot that has been producing some nice CS items today with my Fisher F-75 LTD in Goldsboro, NC, and found my first Confederate Block C button! Backmark is Courtney & Tennant, a Charleston, SC manufacturer. It is also the rarer of the Block C's according to Albert's Button Book, an R75. Quite excited about this find, it has a strong shank which is tilted just a hair, but full. I have learned to love the F-75. This bad boy is sensitive. There is a ton of iron in the area I have been hunting. I have the disc set at 0, and the detector grunts on all iron. I dig all good non-grunt sounds and just pick the good stuff from the midst of the iron. Awesome detector....it is light and sensitive as all get out.