The upgrade details for Cartier are as follows: the finely crafted upgraded movement C1Ct163 has officially been launched. The Cartier limited edition Moon Phase model from Saudi Arabia is a true gem that seasoned watch enthusiasts will recognize. It is well known that this model's prototype came before the birth of the highly sought-after Ballon Bleu that captivated the masses.Dial diameter: 30mm. The cutting-edge XX manufacturer traveled to Swiss private collectors to find this rare limited edition treasure. It has been custom-made with a one-to-one mold to restore the original piece as closely as possible. The three-piece case is compatible with the authentic version, and the overall thickness of the watch is 7.5mm. The moon phase glass at the 3 o'clock position features a CNC-carved crescent slope, not pressed by a mold, upgraded with a sapphire crystal surface that is durable and high-definition.