H.Moser & Cie. Endeavour Endeavour, 321.503-003, Unknown, 38.9 mm, Grey

The H. Moser & Cie. Mayu Small Second 321.503-003 is an elegant timepiece distinguished by its rare platinum round case and refined craftsmanship. Powered by the hand-wound in-house caliber HMC321.503, it features a unique modular escapement along with a hardened gold anchor and escape wheel, ensuring exceptional durability and precision. The movement proudly bears the “Moser Seal,” a mark inspired by the brand’s founder, Heinrich Moser, who insisted that no watch leave the workshop without his authorized inspection—symbolizing a legacy of uncompromising quality. Its slate gray dial with a discreet small seconds subdial offers a harmonious balance of simplicity and sophistication. The see-through case back reveals the beautifully decorated movement, allowing a glimpse into its mechanical artistry. Measuring 38.9 mm, it sits comfortably on the wrist and comes with a strap that enhances its understated luxury. Recently maintained and externally refinished, this watch reflects H. Moser & Cie.’s enduring commitment to traditional Swiss watchmaking excellence.