I have what physically appears to be the exact same disk as Atarimania and it is 1.1 HS.
Attached is an ATX image of his disk.
The disk, unfortunately is in pretty bad shape and quite damaged. I recovered most of the disk, but still there are several sectors with errors. I intentionally use an ATX image to preserve the errors and to identify the damaged condition. I could easily convert it to ATR ignoring the errors. But I wouldn't recommend. Otherwise a corrupted ATR image would start floating around.
The disk doesn't boot. But the directory is intact. And one of the DOS files is also intact. So it is possible to make a bootable DOS disk.