By Alex Doak The latest goings-on in the world of haute horlogerie, from a back-to-the-future 1970s LED digital to Swatch’s new Mission on Earth range and an actually-futuristic LED analogue DIODE TO JOY In the early 1970s, Girard-Perregaux took it upon itself to develop (at huge cost) its own battery-powered movement, the Calibre 350. Appropriately, the 350 launched aboard a wristwatch that hit ‘Battlestar Galactica’ on the scale of sci-fi cool: a DeLorean in miniature called ‘Casquette’, with push-to-illuminate, sideview LED display (in Cylon-visor red, too power-hungry to be ‘always on’). N…