Taylor instruments of rochester ny started out making instruments in 1851. During the industrial years taylor grew with the demands of new technology and made incubator thermometers and controlled environment instruments. This is the time frame i believe this to be from. They are still in business today. This thermometer does not register any change of temperature.The item “ANTIQUE TAYLOR INSTRUMENTS BRASS THERMOMETER TYCO AUTO CIRCULATION” is in sale since Sunday, March 08, 2015. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “johnny_collectibles” and is located in Montville, New Jersey. This item can be shipped to United States.