Also has original small round knob to knock the ring against. I can not find another example of this or anything like this anywhere.The item "Exceptional Mid 1800s Black Americana Bronze Hammered Door Knocker" is in sale since Tuesday, April 18, 2017. This item is in the category "Collectibles\Cultures & Ethnicities\Black Americana\Other Black Americana". The seller is "mdpremier" and is located in Rockville, Maryland. This item can be shipped worldwide.