Sold Cast iron pan with lid, vintage

Sold A cast iron pan that matches the cast iron coaster of the photo next to it. The special thing about this cast iron pan is that it comes with a separate ring with a kind of flower shape, this is also reflected in the coaster. What was this pan used for? To cook or bake something special. We do not know. The black cast iron pan is in good condition.

Diameter bottom pan and top are listed under dimensions.