Uniquely appealing and technically complex, the RM 74-01 and RM 74-02 In-House Automatic Tourbillons offer two new versions of the fully in-house automatic tourbillon calibre. These two striking models, both with the same ultra-skeletonized heart, are distinguished by the materials used for their cases as well as by their aesthetics, making them fraternal twins with unique personalities. Both watches have the same case size measuring 52.63 mm x34.40 mm x13.05 mm, however, their construction varies by model.