The Hour Register on my Chronograph doesn always stay on the twelve when the chronograph is not in use; have I broken my watch?
This is typically called “Hour Register Creep” and does occur on certain types of chronograph movements used by Omega (Lemania c.321 & c.861, and those using Valjoux 7750 & 7751 base movements) throughout the Omega product line as well as other companies using these movements. Thus this is not an issue that is restricted to any one product line (Speedmaster, Seamaster) but can occur with any watch using these movements. However, it seems that watches using the Omega caliber 1045 (base movement Lemania 5100), 1040 and 1041 (base movement Lemania 1341) do not seem to suffer from this malady, or suffer at a much much lower rate than the previously mentioned movements. This problem happens because a spring that causes tension on this register gets slightly out of alignment. Sometimes carefully resetting the chronograph can minimize this problem from occurring, until you decide to have the watch serviced. Another workaround is to simply press the reset button before activating the chronogra
