Case is 34.8mm in width 43.7mm in length, and 10.2mm thick, 950 platinum, sapphire crystals front and back with display case back, crown-integrated monopusher with ruby cabochon, and water resistant to 30m. Dial is silvered opaline with applied rhodium-finished beaded hour markers, an oversized Roman numeral Xll, burgundy railroad minute track, triangular corner motifs, two snailed chronograph counters, and blued steel hands. Movement is calibre 1928 MC, manual winding, 28,800vph, monopusher chronograph developed with Le Cercle des Horlogers, with column wheel and horizontal clutch, and bridges shaped to follow the curvature of the Tortue case. Strap is burgundy alligator leather with a platinum pin buckle. Power reserve is 44hrs. Price on request