For 11 years, Watches International, the original annual of the world's finest wristwatches, has set the standard for up-to-date reference guides devoted to luxury timepieces. Now they have started a series, Grand Complications, focused on high-end watches and timepieces that delves into the complexities of high-end watchmaking. The annual devotes chapters to tourbillons, repeaters and sonneries, chronograph rattrapantes, perpetual calendars, equations of time, astronomical indicators, GMTs, retrogrades and host of novelties. It explores the roots and origins of these complications as a complete compendium of brands and watches that fall within the realm of haute horology, complete with full-colour images and detailed technical descriptions. It also features more than 1,000 full colour photographs, a full glossary, and contact information for each house, making this the must have reference for watch collectors and professionals.