Christopher Ward C90 Beckett's Power Reserve, Руководство пользователя

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Appendix
The A07, is one of the "new" generation of ETA-movements. The minute hand is not included in
the normal gear chain. It stands beside it. All the older movements have a real-minute which stands
between the barrel and anchor under pressure in the middle of the movement.
The newer ETA movements have a bigger barrel and another wheel calculation to increase the
power reserve. Between the minute-hand and the real wheel train are two teeth meshes which have
some play (or what we call gear slack). If you calculate the play of the mesh and add the play of the
bearing of these wheels you arrive at a fault of 1° to 1.5° for the minute hand. This corresponds to
10 to 15 seconds delay in initially setting the first minute, all subsequent minutes are 60 seconds.
However it is not a fault, merely a characteristic of the movement.
There is only one solution for the user that is concerned about this tolerance when setting the time.
Set the hands anti clockwise exact to the corresponding Minute-Index.
You cannot destroy the watch by setting clockwise, but when you have a date you have to set the
time clockwise, because otherwise it can harm date-jumping mechanism.
So, the best is to set the hands clockwise but 10 minutes after the real time. And come back
anti-clockwise the last ten minutes to the right time... then push in the crown and everything
should be ok.