How do you differ fake from real 1843 Silver dollar?

If it has a motto on the back (the banner saying in god we trust) then its a fake. If its magnetic its fake. If it has a ridge running all the way around the center of the reeded edge the coin it is fake. If the denticles are not all symetrical its fake. Lastly, a real 1843 silver dollar weighs 26.73 grams and has a diameter of 38.1 mm. Anything other than that is a fake.