The Master Ultra-Thin is core to what Jaeger-LeCoultre is known for, a classic time only watch that has the proportions of a dress watch and has been tested enough to be a sports watch. The 40mm x 8.62mm thick
link case is not the thinnest watch on the list but might be the most versatile with
link 50 Meters of water resistance, a steel case,
link and the Master testing – testing that puts the watch through 1,000 hours of running in different temperatures, pressure, and shock.
