For decades, the boutique manufacturer Christophe Claret has produced movements for some of Switzerland’s most prominent watch brands. In 2009, the company stepped out from behind the curtain and into the spotlight with a series of highly complex watches released under its own brand name. The latest of these timepieces is the Christophe Claret Poker, a completely mechanical wristwatch that lets wearers actually play three-player Texas Hold’em poker on the watch itself—and it is one of the watchmaker’s most com…