This auction is for a new old stock factory Ford Windshield Wiper Switch for 1979 - 1991 Ford LTD Crown Victoria Country Squire Mercury Grand Marquis and Colony Park models with Non Intermittent Wipers.  This is Ford part number D9AZ-17A553-A and was replaced by Ford part number E1AZ-17A553-B. This is the version with the chrome knob.  Brand new, Obsolete from Ford and hard to find.  Nothing beats the quality and fit of a genuine Ford part for your restoration.  Feel free to ask any questions.