Can you identify this item?

I found this at an estate sale on Friday.  I have no idea what it was used for.  I think it is a lid to a bowl and the holes allow steam to escape.  Does that make sense?  Or is it actually something else?  Did this cover go over potpourri and the holes allowed the scent to fill the room?  Did it cover a food item on the table to protect it from the air or bugs?  I don't know.  Do you??

I can see knitting needles in it, paintbrushes, pretty hair sticks, or fancy chopsticks.  It would look good over a plate as a serving piece.  I think it is very pretty.  Reminds me of Lemoges.  Just too bad that whatever it went on or to is missing.

Something else I would like identified is this stamp of a Corona typewriter.  Do you know who makes it and if it is still available?

Thanks for any help you can provide.  I am going to search online for this stamp as well, but perhaps you already know about it.