Original Vintage Western Holly Gas Stove Used Star Burner Cover Plate. This is the burner simmer/warmer cover plate that rests on the round porcelain enameled drip tray. Used grates show normal wear. 

 Regarding Cleaning:

We clean the heavy grease (if any), but you still may want to give it a more thorough cleaning. (Super-Clean in the purple container on Amazon works great.)