This is a late 1800s mechanical doorbell in good working condition. It is paired with an antique ornate iron trip lever in black paint .Bell is brass and its base is iron. The base would be installed with concealed screws. Bell diameter is 4 inches. The trip lever at widest points is 4 1/2 by 3 inches and lever length is about 2 3/8 inches. This bell produces a pleasant ring-a-ling sound like an old fashioned bicycle bell, only louder. No cracks to the bell or lever.