Case is in 18k YG, PG or Platinum, size 38.17mm x 28.75mm. The “cloche” (bell) shape appeared in Cartier pieces in 1920. “Cloche de Cartier”, because, when placed horizontally, its outline is reminiscent of a service bell rung at a counter. Cartier in house manual winding 1917MC caliber. Power reserve at 38 hrs. Limited to 100pc on YG, PG & PT YG/PG US$27500 PT US$31000