Don’t really know much about this Hygrograph. Don’t know the age. Don’t know how or if it works or if its missing any pieces. I will be insuring this item. The item “Antique Hygrograph, scientific humidity instrument” is in sale since Tuesday, November 23, 2021. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “themadhadder” and is located in Taylorsville, Utah. This item can be shipped to United States.
