GENEVA (Reuters) - Swiss watchmakers expect to at least stabilise sales this year after two years of decline as the important Chinese and U.S. markets show signs of turning the corner, executives said at an industry event on Tuesday. Luxury watchmakers have been grappling with a combination of weak demand in their biggest markets, Hong Kong and the United States, and Chinese tourist shoppers avoiding Europe for fear of militant attacks. Recent comments from executives suggest the worst may be behind them, however.