First off, those are still thumbnails. Full size images is an option when you post. It posts a full size image - like this!
Here's a sharper image. Used an online convertor. For those of you that would like a free online image editor, here's a link: https://raw.pics.io/sharp-image
If nobody that knows for sure whether this is a double die, then maybe you should post again. Sorry I can't help you.