Time signal (ONOGO) as broadcasted by Nauen Transmitter Station in 1934. In particular, the sequence of letters ONNNNNOGGGGGO was sent with the (Morse) points of the letters N and G representing the actual time signals. Image is based on information from F.G. Gauss (the coincidence signal is not completely included in the graphic, since either Gauss depicted it incorrectly or it is not recognizable due to very poor print quality).
F.G. Gauß: Fünfstellige vollständige logarithmische und trigonometrische Tafeln, Konrad Wittwer, Stuttgart 1949 (Nachdruck der Auflage von 1934)
Phrontis