This is one of my favorites of the flat wick lamps. Made by P&A Risdon Lamp Co. Danbury CT., around the late 1800s brass font & brackets. P&A is the Plume & Atwood Manufacturing Co. They made many different lamps under a lot of patents, including the Aladdin brass burners from 1869 till 1955, when the Waterbury factory was destroyed by Hurricane Connie flooding.