Original mechanical weather station - hygrometer / thermometer from the 50s/60s in laboratory version from Göttingen. Is mechanically powered by a wind up spring with the key. Is located in the registration drum. To open this: Pull out the chromed nut on the left and open the cover. The key is then accessible from the top. Effortlessly registers the temperatures as Farenheit and Hygrometer readings which are produced/printed by the apparatus on the rotating cylinder. The pictures are detail shots. Manufacturer built-in blocking of system during transport. An important advantage. Also suitable as historical object in domestic environments. Is also technically still usable. Is sent via certified transport company PostNl, General Logistic Systems, K > L > M > or otherwise.