I'm not seeing it. Maybe others can. I think sometimes we, collectors, try a bit too hard to see what we want, when it just isn't there.
Here are the two points that I saw. Due to whatever gunk or patina is in there, it does make it hard to see. But I notices a raised vertical line coming out of the trumpet tail and a curved line just above the center of the S. Compared to what is listed on Varietyvista.com View attachment 1542480
Looking again this morning your MM has the wrong placement. The S/D is under the 4 Yours is half under the 4.
I agree with the others here: placement is off and the review of the MDS/LDS diagnostics on Coppercoins aren't there (about the date).