Here’s an interesting question that someone asked:

“I have had my Brietling Navitimer for about a week now. I have a question about long term use of the chronograph. I just like the way the watch looks with the second hand sweeping around the dial. Is there any significant downside to just letting the chrongraph run all the time? I would guess the time the watch can run without being wound is reduced. Also, I worry about the extra wear on the movement. Does anyone else let there chrongraph run all the time? Any other comments?”

Well, the Valjoux 7750 is not designed to have the movement running continuously, however it is not going to destroy the watch. There will be extra stress on the movement and it will not be quite as accurate as if you ran it without the chronograph running. Also, It will also drain your power reserve faster. Some watches have a power reserve with and without chronograph running rating, usually about 10% less with the chronograph running.

Hope that answers your questions!