Patek Philippe: 5135J WITH BOX & CERT. The Patek Philippe Annual Calendar features a mechanical automatic movement; ivory colour dial; annual calendar complication with displays for the day and month by hands, while the date and moon phase are shown in apertures; power reserve indicator; center seconds hand; sapphire crystal, transparent case back; and 18K yellow gold case 38mm by 51mm. Fitted with a original croco leather strap fitted with an original 18k yellow gold buckle. It's movement is composed of over 355 parts, which together power it's annual calendar and moon phase complications.