Look up georgewashingtonbuttons.org I believe the guys name is Robert Silverstien from new windsor ny he has the largest collection of buttons and the most knowledge. He can tell just by looking. He is the best by far. When you reach out to him tell him brother nick from West Point sent you.
It is a Confederate "Script I" button, used by the Confederate Infantry. I don't see a backmark, so it is probably one made "locally" down south. A very nice looking button any day of the week. Congrats!
Thanks for the replies it did have a backmark it’s a S Isaacs Campbell & Co/London.
I was very surprised to find it in my colonial spot. However I have found Virginia buttons on the same farm.