Thermos flask
Thermos flasks
Reinhold Burger standing on the courtyard in Wilhelm-Kuhr-Straße 3
Reinhold Burger's son Helmut standing in front of a showcase for the hygienical exhibition - also seen on many world exhibitions
Correspondence from and to the whole world
Switchboard
Reinhold Burger with his grandson Axel
Apparatus
Evacuation pump
Thermos flasks