This is a very nice used Antique Perkins rotary light switch with a porcelain base. The switch clicks when turned and the on/off indicator moves. Marked "UND. LAB INSR", "Perkins 10 AMP 250V", "Made in USA". Patent date on back is Sept 17, 1912. Diameter of base is approx 2 3/8". Perkins logo on knob. This switch is in very nice shape. The pictures portray the condition very well so please use them accordingly. The metal cover appears nickel plated and is non ferrous. Shipping will be via USPS first class mail and will be .00. Please ask any questions prior to bidding.