FIELD: mechanisms.
SUBSTANCE: present invention relates to clocks (1) containing first oscillator (15) vibrating at first frequency and first gear (5) with source (9) of energy, for time display and chronograph system (51), containing second gear (25) connected with first gear (5) via connecting device (44), for selective measurement of time. According to invention chronograph system (51) also includes second oscillator (35), which is connected to second gear (25) and oscillates at second frequency.
EFFECT: besides, second gear (25) is connected with first gear (5) by elastic connecting device (41) for synchronization of both oscillators (15, 35) speed, using same energy source (9), when connector provides said measurement of time.
14 cl, 4 dwg
