@nand, you will find a whole subforum here devoted to coin photography. I recommend you check out some of the posts there to build a much better photography system for not much more money.
With that said, I've taken the liberty of cropping, enlarging, and enhancing your photograph showing what very much looks like a letter S partially obscuring the letter E. While I agree 100% that it *looks* like a letter S, there just isn't a way for this to have happened as part of the minting process. Rather it is just some random damage that has moved the metal around a bit into something like a letter E. As @e&v pointed out, this is called
Pareidolia.

"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz