Ballon Bleu de Cartier watch. 40 mm. mechanical movement with automatic winding. calibre 1847 MC. Case in 18K rose gold set with 52 brilliant-cut diamonds totalling 1.06 carats. fluted crown decorated with a sapphire cabochon. silvered sunray-brushed dial. blued-steel sword-shaped hands. sapphire crystal. burgundy leather strap. ardillon buckle in 18K rose gold. calendar aperture at 3 oÕclock.