THE average Swiss watch costs $685. A Chinese one costs around $2 and tells the time just as well (see chart). So how on earth, a Martian might ask, can the Swiss watch industry survive? Yet it does. Exports of watches made in Switzerland have grown by 32% by value over the past two years, to SFr21.4 billion ($23.3 billion). Demand in the biggest markets (China, America and Singapore) dipped recen