Limited edition of 30 pieces.
CALIBRE RM53-01: manual winding tourbillon movement with hours and minutes.
Dimensions : 44.50 x 49.94 x 16.15 mm.
Circa 70 hours (±10%).
DOUBLE SKELETONISED BASEPLATE WITH GRADE 5 TITANIUM BRIDGES
Grade 5 titanium is employed for the bridges and the highly atypical double baseplate construction, which consists of a first, ‘central’ baseplate that firmly holds together the various wheels of the calibre, and a second, ‘peripheral’ baseplate, attached to the central baseplate by cables and supporting the entire tensioner system.
Grade 5 titanium is a biocompatible alloy used in aeronautics for its high resistance to corrosion, remarkable lightness, and low expansion coefficient. The suspended movement and this titanium comprised of 90%titanium, 6%aluminium and 4%vanadium together improve the strength of the movement, ensuring smooth functioning of the going train and optimal shock resistance.
The skeletonised baseplate and the bridges were subjected to separate and extensive validation tests to meet rigorous strength requirements and offer an extreme weight/resistant ratio.
The movement at the heart of the RM 53-01 rests on 2 braided steel cables just 0.27 mm in diameter. The tension of these cables is made possible by the 10 pulleys and 4 tensioners affixed to the peripheral baseplate and to each side of the main bridge.
The cables run through the tackle pulley system and are attached to the tensioners on the other side. The watchmaker tensions the system by tightening a spline screw located at the centre of each tensioner. The pulleys ensure that the tension of the cable remains constant, and therefore that the system is balanced. Designed to sit suspended within the case, the calibre RM53-01 can withstand shocks exceeding 5,000 g’s.