By Michael Gold TAIPEI (Reuters) – Taiwan’s Quanta Computer Inc 2382.TW will start mass production of Apple Inc’s AAPL.O first smartwatch in July, a source familiar with the matter said, as the U.S. tech giant tries to prove it can still innovate against rival Samsung Electronics Co Ltd. The watch, which remains unnamed but which company followers have dubbed the iWatch, will be Apple’s first foray into a niche product category that many remain skeptical about, especially as to whether it can drive profits amid cooling growth in tech gadgets. The production will be a boost to Quanta, given that its work for Apple till now has focused on laptops and iPods, product lines that are in decline. Quanta’s role though is likely to raise questions about what involvement Hon Hai Precision Industry Co, one of Apple’s biggest suppliers, will play in production.