While April 24, 2015, was the official in-store launch of the Apple Watch, the story obviously starts long before that. Like, way before that. If you want some juicy
link details
link about the earliest days of high-level Apple engineers thinking about and working on watch concepts, check out Ben's interview with then Apple Chief Design Officer Jony Ive from
link HODINKEE Magazine, Volume 2, as well as David Pierce's incredible "Secret History" from the May 2015 issue of Wired. They've got the goods.