An exceptionally scarce Audemars Piguet 2015 Perpetual Calendar Collector Book Set, presented in the original dual-book slipcase. This oversized collector’s edition features two beautifully produced hardcover volumes dedicated to one of Audemars Piguet’s most celebrated complications—the Perpetual Calendar. Included are: • Collector Book – Calendar Watches (green volume) • Novelties – Royal Oak Perpetual Calendar (blue volume) Filled with stunning full-page photography, technical illustrations, historical references, movement details, and Royal Oak Perpetual Calendar models, this set was produced exclusively by Audemars Piguet and was never offered through traditional retail bookstores. A wonderful addition to any: * Audemars Piguet collection * Royal Oak collection * Luxury watch library * Horology collection * Coffee table library * Watch boutique display * Collector of rare watch catalogs Approximate book size: 12.5” x 9.5” ✔ Original dual-book slipcase/binder ✔ Collector Book – Calendar Watches ✔ Royal Oak Perpetual Calendar Novelties