Seller: nysalvage (4,016) 100%, Location: Oneonta, New York, Ships to: US & many other countries, Item: 191889611079 Nice antique door bell has brass bell and nickel plated cast iron back mounting plate with a brass turn key actuator knob. It is marked with a patent date on the bell the manufacturer is unknown . The bell is scratched, and has a few very small minor dings. The nickel plating on the backing is scratched, chipped, and worn. All of the mechanical parts function as they should. It has a loud great sounding ring. Overall very good condition. Measures approx.- 3 1/8"diameter x 2"depth, would work on a door 1 5/8" thick max.