Cartier Rotonde de Cartier Astrotourbillon

Cartier's Rotonde de Cartier Astrotourbillon, reference WHRO0041, has a 47 mm case in 18K rose gold. The case is 14.9 mm thick and carries a sapphire crystal and a display back. The movement is the manual-winding calibre 9461 MC, made up of 233 parts including 23 jewels. The tourbillon cage completes a rotation in one minute, and the skeletonised bridges form Roman numerals. A semi-matt grey alligator-leather strap is fitted, with a double adjustable folding buckle in 18K rose gold. Cartier rates the case to 30 metres. The watch is a limited edition of 30 individually numbered pieces.