The Ref 15305 was introduced at the SIHH, (the Salon Internationale d’Haute Horologie) in 2010 and immediately became a collector's favorite. Similar in size to the original Royal Oak ‘Jumbo’ at 39mm and faithful to the original Genta design, the 15305 combines sporty elegance and high horology.  Audemars Piguet's ability and reputation for producing high-end openwork calibers is well known, and in this iteration, the contrast between sporty case design and the high horology display is particularly appealing. On display, through glare resistant sapphire crystal, is the caliber 3120, constructed from 239 separate hand finished parts. It is offered in very good condition and accompanied by all of its accessories.