Fl. Nr. 23825. Manufactured by Denner & Pape of Hamburg. DR 2 dead reckoning 'triangle' computers were commonly referred to by pilots as a Knemeyer. 15cm diameter in size with a rotating inner ring and perspex 'pointer' arms. 1939 dated. Shows wear and use with some discolouration and knocks. Retains all of the screws (later examples were riveted). Perspex pointer absent on reverse side otherwise in good used condition with early date. Priced accordingly. Stock code M23459.