The Memovox (with built-in mechanical alarm function) is one of Jaeger-LeCoultre's signature watches, a best-seller since the 1950s; this model is from the Master Control range, a series of high-grade movements tested for 1000 hours before hitting the streets. Self-winding movement (45-hour reserve), with independent audible alarm mechanism, internal rotatable bezel, and a gold plaque on the rear certifying the 1000-hour test. Pressure-resistant to 10 atmospheres (about 100m) thanks to the Compressor lock-down buttons and case. Superb condition, and guaranteed for two years.