This "two-tone" version of the Alarm Travel Time Reference 5520 is distinguished by a rose gold case with four white gold pusher tubes framing a gray sunburst dial. The four-patented movement pairs the exclusive Travel Time second time-zone system (in which the date is indexed to local time) with a 24-hour alarm mechanism featuring a hammer striking a classic gong. Maker: Patek Philippe. Reference: 5520RG-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.