The Luftwaffe Stellungsanzeiger FL 20853-1 represents a significant piece of German aviation technology from World War II. This precision instrument was manufactured by LGW-Hakenfelde Berlin (Luftfahrtgerätewerk Hakenfelde), one of the most important suppliers of aircraft instruments to the Luftwaffe during the war years 1939-1945.

The factory in Hakenfelde, a district in western Berlin in today's Spandau borough, was part of the Third Reich's extensive armaments industry. The Luftfahrtgerätewerke specialized in producing navigation, communication, and control instruments for various Luftwaffe aircraft types. The designation with equipment number FL 20853-1 follows the Luftwaffe's standardized numbering system, where “FL” stands for aircraft or aviation equipment.

A Stellungsanzeiger (position indicator) was an electromechanical instrument that displayed the position of movable aircraft components. Such devices were essential for flight crews to monitor the status of critical systems. Position indicators were typically used for: displaying landing gear position (retracted or extended), flap positions, positions of cooling shutters on air-cooled engines, or the position of bomb bay doors on combat aircraft.

The technical construction of these instruments was highly advanced for its time. They usually worked with electrical transmitter systems that converted mechanical movements into electrical signals. These signals were then transmitted via onboard wiring to the instrument in the cockpit, where a pointer or display device showed the corresponding position. The reliability of these systems was crucial to the war effort, especially during night flights or instrument flight conditions when pilots had no visual confirmation of component positions.

Manufacturing at LGW-Hakenfelde was subject to strict military quality standards. Each instrument went through multiple inspection stations and had to meet the Luftwaffe acceptance regulations (LA-Vorschriften). Production often occurred under difficult conditions, particularly in the later war years from 1943 onwards, when Allied air raids increasingly threatened Berlin's industrial facilities. Nevertheless, production had to be maintained to supply the Luftwaffe with necessary spare parts.

The use of such instruments extended across various Luftwaffe aircraft types. From fighters like the Messerschmitt Bf 109 and Focke-Wulf Fw 190 to bombers like the Heinkel He 111 and Junkers Ju 88 to transport aircraft – all required reliable position indicators. The specific equipment number FL 20853-1 suggests a particular variant, possibly optimized for a specific aircraft type or system configuration.

After the war ended in 1945, many of these instruments were confiscated and examined by the Allies. The technical expertise embodied in these devices particularly interested American and Soviet engineers, who utilized German aviation technology for their own developments. The Hakenfelde factory itself was dismantled after the war, as it was located in the western part of Berlin under Allied control.

Today, such instruments are sought-after collectors' items and important witnesses to aviation history. They document the technical level of the German aviation industry and the complexity of aircraft systems of that era. For historians and technical museums, they offer valuable insights into the instrumentation and ergonomics of military aircraft during World War II. The preservation of such objects contributes to understanding this historical period and enables future generations to comprehend technological development.