Check the listing for details. Vintage Airguide Hygrometer & Thermometer Brass & Plastic Desktop Display. Condition: Used. Listed at 24.00 USD. Step back in time with this charming vintage Airguide hygrometer and thermometer. Its brass and plastic design brings nostalgic utility to any space, telling stories of precision and craftsmanship. • Dual-function: measures both humidity and temperature • Sturdy brass and plastic construction • Desktop design with felt-lined base • Made in Chicago by Airguide Instrument Co. Peeling felt on the base and visible discoloration on the back. Front brass frame remains intact with clear functionality. Top to bottom = 4 inches.