This Charles II Half Crown certainly looks like the rare variety of this date, which reads GRATTA in error. Because it is so worn, it's difficult to be precise. I have looked under a glass, and I can see what looks like the tops of two T's, but is it a "trick of the light" which makes it appear so? Look at both A's and you can see a difference in size to the horizontal bar. I have looked at an angle, and there is a definite bulge where the serif of the "T's" are. I have been collecting over 30 years, and would welcome any comments.