Please make sure you put the battery in place as per the illustration on the back of the clock.
The Hands are lightweight metal and bend easily but will also straighten easily, the clock hands should be moved ONLY on the wheel on the back of the clock mechanism as the hands are a push on fitting. Set your clock at the 12:00 position exactly - either when installing the hands or changing a battery. It ensures synchronisation - do this whenever installing a battery and then move the hands to the correct time using the wheel at the back.
You will need to install a fresh, brand-new AA Duracell or Energiser for example battery that is NOT a rechargeable type. (Not Supplied)
Do not allow the hands to cross as this will stop the mechanism. The clock will keep time once positioned on the wall.