Jaeger-LeCoultre Master Ultra Thin Moon Series features a case diameter of 39mm x 9.9mm, perfectly synchronized with the original. The technical breakthrough comes with the Jaeger-LeCoultre Cal. 925/1 movement, offering 100% synchronization with the original in-house movement. It ensures stable timekeeping and robust quality.Upon observing the watch dial from the side, one can notice a subtle curvature. ZF has invested significant time and effort to repeatedly adjust the mold to achieve this effect, ensuring that the charm and feel are comparable to the original. The Jaeger-LeCoultre Master Ultra Thin Moon satisfies all your beautiful sentiments regarding moon phases.This image showcases a top-tier replica captured in real life!