The Swiss 'lucky charm' clock is displayed in the technical occupation school in Porrentury, Switzerland

The Swiss 'lucky charm' clock is displayed in the technical occupation school in Porrentury, Switzerland

© EPA/Georgios Kefalas/Alamy

The Swiss 'lucky charm' clock is displayed in the technical occupation school in Porrentury, Switzerland

The Swiss 'lucky charm' clock is displayed in the technical occupation school in Porrentury, Switzerland

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