Junghans (1861) started producing chess clocks only from 1900 (after a merge with Thomas Haller). The mark on the movement '7.14' might refer to July 1914, a year, where all Junghans movements might have been marked as 'month-year'. Proven 'age' evidence is a Junghans Advertisemen in 'Deutsches Wochenschach und Berliner Schachzeitung' from 1917. This model could be recognized from the games between Alekhine-Colle (Paris, 1924) as well as Tartakower-Colle (Paris, 1929).