Mechanical wonders, diamond-encrusted guitars, synthetic diamonds, and celebrities—Baselworld 2015 was an elegant and educational affair.     BASELWORLDSwiss Federal Councillor Johann Schneider-Ammann and the Swatch Group’s Marc Hayek talk timepieces at the opening ceremony.BASELWORLDChow Tai Fook’s Alex Wong, Gibson’s Mark Liu, Coronet’s Aaron Shum, and Guinness’ Richard Stenning toast Coronet’s record-setting guitar.BASELWORLDAt a press event, François Thiébaud, Sylvie Ritter, and René Kamm mourned the passing of exhibitor committee president Jacques Duchêne.BASELWORLDThe watch hall swarmed with buyers as well as tourists; visitors can purchase guest passes to gawk at the timepieces on display.BASELWORLDJCK’s Mark Smelzer, GIA’s Anna Martin, Standard Chartered Bank’s Kishore Lall, JCK’s Bill Furman, and Reed Exhibitions’ Yancy Weinri