Jaeger-LeCoultre Master Series Jaeger-LeCoultre/410257J/42mm/Alarm Watch features a Japanese 9015 movement with a three-year quality assurance and no repairs needed. The Jaeger-LeCoultre Master 410257J series calendar watch showcases a modern dual-crown design, complemented by elegant yet sporty flowing lines. It is profound and graceful, yet extraordinary.The case size of the watch is 42x13.1mm, with a classic and sleek case that is meticulously handcrafted, featuring a brushed finish on the side and polished edges. The craftsmanship and processes align perfectly with genuine products, and the case back is engraved with distinctive Jaeger-LeCoultre diving apparel patterns.The strap is made of natural rubber, which is thin, long, and soft enough to wrap comfortably around the wrist, paired with the original Jaeger-LeCoultre buckle.