Baume et Mercier Watch Riviera Automatic Perpetual Calender 10786. Driven by the prestigious Baumatic manufacture calibre, this Riviera Perpetual Calendar in 40mm combines watchmaking precision with sporty elegance. Its distinctive design is underlined by its steel case with neat architectural lines, its grey dial with vertical sun-brushed finishes and snailed counters in perfect harmony with its gilded oscillating weight and its watchmaking attributes. This model is fitted with an integrated three-row interchangeable stainless steel bracelet reworked with decorative bevels on the central link.