Hygrometer (Thermometer and Humidity) 75mm face diameter, 116mm base dia.
HYGROMETER 75mm FACE 75mm face single lug hinging front
75mm diameter face, mounted in a porthole styled solid brass case with bevelled glass front.
Also available set on a timber back board as a pair to enhance any cabin, office or home.
The hygrometer is a combination of humidity and thermometer on the one face.