Höhenmesser für Flugzeuge
No. 6684 by G. Lufft, Stuttgart, calibrated 0 to 4,000 metres. It was designed to be suspended on springs attached to the cabane struts of the upper wing and positioned in the pilot's forward field of vision. Case is 25 mm deep by 70 mm in diameter, excluding attachemnt fittings. This specific instrument is shown in a contemporary black and white photo displaying instruments carried on German aircraft.