Unknown tool
I seem to have acquired something that I don't know what it is. It is a small tool with blue cogs (numbered 1-10) on the inside that turns in a clockwise motion. There is a screw that says 'open' but I haven't been able to get opened.
On the bottom is "quilt dome" made by Clover. There are no directions, so I have no idea what it is, how old it is, or how to make it work.
Has anybody seen or used this object that can help me figure it out?