The Replica RM051 Watches in the Replica Richard Mille collection are available with a variety of complications such as tourbillons, moon phases, and chronographs. Within the collection, there are both gents and ladies timepieces, all of which contain a distinct attention to detail. Aesthetically, there are options as well. Some of the dials are skeletonized, which allows the inner workings to be seen from the watch face, whereas others feature a sapphire case, which allows the inner workings to be seen from the reverse of the watch face. The Perpetual Calendar model was added to the collection in 2010 and has quickly become one of the most popular watches within the Richard Mille Replica Watches family.