Check the listing for details. Vintage Rotary Turn Switch Single-Pole, 2-Circuit, Electrolier, Fan, Porcelain. Color: Black, White. Listed at 45.95 USD. Vintage Rotary Switch Single-Pole, 2-Circuit, Electrolier, Fan, Bakelite, Arrow ◾ Free Shipping 🚚==Single-Pole 2-Circuit (Also called Electrolier or Fan Switch)3 Terminals4-Positions (see below for operation)5A @ 125V2A @ 250VTop cover is Bakelite. Bottom base is Porcelain.Made in USA The Arrow Electric Co., Hartford, CT (Founded: 1888)Back in the day, they called electrified chandeliers, Electroliers. Other than for lighting, this type of switch has many other uses, such as speed control on a fan. Single-Pole 2-Circuit Switch Operation:Position #1: Only Circuit #1 Closed (ON) Position #2: Only Circuit #2 Closed (ON) Position #3: Circuits #1 & #2 Closed (ON) Position #4: All Circuits Open (OFF)For a 2-tiered Electrolier, this switch would provide the following 4 functions: Turn tier #1 lights ON onlyTurn tier #2 lights ON onlyTurn tiers #1 & #2 lights ONTurn all tiers lights OFFDimensions: 2-1/4" tall. 2-1/2" bottom diameter. Condition: New Old Stock. I sell a good number of antique/vintage switches which include Rotary, Snap, Push Button, Tap, Despard Style, Tumbler & Toggle. They come in single-pole, double-pole, 3-way, 4-way, High/Low/Medium & momentary switches. And some unusual switches as well. You can go to My Store to see what I currently have listed. I also have a backlog of switches I haven't listed yet, so if you need a particular type of switch (brand name, size, etc.) or quantity, please contact me and maybe I have what you need. ⭐ Unique among vintage switch sellers, I thoroughly clean and test all my switches to ensure they are in proper working condition. See last photo for cleaning process. For more Vintage Switches, go to My EBAY Store or go to My EBAY sister site Store. Payment and Shipping Same or Next Day Shipping Package Tracking on All ShipmentsUSPS Shipping Only