Wristwatch with repeater mechanism striking hours, quartersandminutes. It also includes a perpetual calendar with the phases of the moon (a yellow gold moon travelling against a lapis lazuli sky). Notwithstanding such particularly complex ancillary mechanism, its mechanical movement measures a mere 2.72 mm thick. 18K yellow gold case ; alligator strap linked to the case by a centre attachment. (GERALD GENTA)