Yes, the 505 came with a cover.
I knew that the 600 didn't have a cover right away, but thought I could get away without one as I thought it's casing would be made from aluminum like the 505.
But the 600 has a plastic back and mine got scratched after 2 days (I really carefully laid my unit on some crumbs on the table, unintenionally). So now I use the cover so I mainly don't have to see the scratches.