Jaeger-Lecoultre JJF - Original Weight Master Moon Phase .Jaeger-LeCoultre Master Moon Phase Series .The latest version from JJF Factory is the original weighted edition, with a size of 39MM and a thickness of 9.6MM. It is currently the thinnest and closest to the original available in the market.1. The movement uses a Dandong integrated cal. movement, synchronized with the original model, featuring intricately engraved and filled text on the back, restoring the details! This is not a modified version using other generic movements or deck movements.2. The case is made of L-grade stainless steel with a split CNC processing that provides an almost perfect slim and clean look! .3. The strap is made of genuine Italian calfskin and has been upgraded to the latest version with a quick-release feature, matching the original with an easy-to-remove buckle. The curvature of the buckle has been increased to enhance wearing comfort and experience.4. The slightly curved dial features a sunburst texture and is finished with enamel polishing. The logo has been upgraded from the printed version of the older model to a three-dimensional metal logo, significantly enhancing the overall aesthetics and texture! .JJF Factory strives for perfection and invites you to experience the Moon Phase Master that is closest to the original!