The thickness of a watch case is influenced by a number of factors, including the materials used, the movement inside, and the design of the watch itself. A thin watch, often seen in dress models, requires a more delicate and refined design breitling replica, with movements that are slim and compact. For instance, the ultra-thin movements found in watches like the Jaeger-LeCoultre Master Ultra Thin or the Patek Philippe Calatrava are designed to offer a sleek profile without compromising on mechanical precision.