Jaeger-LeCoultre Memovox

The Memovox launched in 1950 as Jaeger-LeCoultre's mechanical alarm wristwatch, the first practical alarm-complication wristwatch produced commercially. The original Cal. 489 hand-wound movement drove a small hammer striking against a pin set in the case, producing a distinctive buzz-like alarm tone that became the line's acoustic signature. The watch is operated via two crowns: the upper crown sets and arms the alarm time, the lower crown winds the alarm spring and sets the main time.

The 1956 Cal. 815 introduced automatic winding, making the Memovox the first automatic alarm wristwatch. The 1959 Memovox Polaris took the line in an unexpected direction: a 200m water-resistant diver's alarm watch with internal rotating bezel and three-crown layout (alarm, internal-bezel, time). Used by professional divers as a no-decompression-stop reminder, the Memovox Polaris became one of the most-collected vintage diver references and template for the modern Polaris collection.

Standard Memovox references remained in continuous production through the 1960s and 1970s, then went into hibernation during the quartz crisis. Lined revived 1989 Cal. 918 automatic alarm, 1992 Master Memovox at 40mm with gong-on-case-back acoustic chamber for richer sound, 2008 Master Compressor Memovox with diving-bezel layout, and 2018 Polaris Memovox as the contemporary diver-alarm reissue.

The current Cal. 956 automatic alarm runs at 28,800 vph with 45-hour reserve. Polaris Memovox (40mm steel) and Master Memovox references continue alongside in JLC's catalogue. The alarm tone and the ritual of arming and triggering it remain mechanical-watch theatre at its most engaging. Retail spans ~€12,500 (Master) to ~€16,500 (Polaris). Vintage 1950s-1960s Memovox references trade €3,000-€10,000 depending on condition and configuration.