The Royal Oak 26577TI.OO.D002CA.01 is the production version of the RD#1. A total of three patents, two for the moment and one for the case construction, ensures that the quality of the sound coming from the minute repeater is unequaled. The case of the Supersonnerie is made of titanium; the crown and pushpieces are made of black ceramics. The caseback features apertures and a second [inner] copper shield to enhance the sound.
