This durotherm hygrometer is mint in the box. The item “Mint in the box, Brass Hygrometer Relative Humidity made in west Germany, m# m2a4″ is in sale since Sunday, September 9, 2018. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “moorjacki” and is located in Lexington, [...]