Fl. Nr. 23825. Manufactured by Plath 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. 1941 dated. Shows relatively light wear and use with some discolouration and small knocks. Retains all of the screws (later examples were riveted) and both perspex pointers. Good '+'. Stock code M23458.