Jaeger-LeCoultre Memovox Polaris (1968, Dive Alarm)

The Jaeger-LeCoultre Memovox Polaris is one of those watches that makes collectors stop mid-sentence. Introduced in 1968, it combined two complications that had never been successfully merged before: a mechanical alarm and professional-grade dive watch capability. The result was a timepiece that could wake you up in the morning and keep you alive underwater in the afternoon. Its innovative triple-caseback construction, designed to amplify the alarm sound even through a wetsuit, remains one of the most clever engineering solutions in watchmaking history.

The original Polaris was produced for only a few years, making surviving examples genuinely rare. Combined with Jaeger-LeCoultre's reputation as the "watchmaker's watchmaker" and the growing appreciation for vintage dive watches, the Memovox Polaris has become one of the most coveted sports watches of the 1960s.

The Memovox Legacy

Jaeger-LeCoultre introduced the Memovox (from the Latin "voice of memory") in 1950 as one of the first mechanical alarm wristwatches. The original Memovox was a dress watch, but JLC recognized the potential for the alarm function in sports and professional contexts.

The alarm mechanism in a Memovox works through a hammer that strikes the caseback, creating an audible buzzing sound. This is different from a traditional alarm clock's ringing; the Memovox produces a distinctive, somewhat insistent buzzing that is transmitted through the case and into the wearer's wrist.

The challenge for a dive watch application was clear: underwater, sound travels differently, and divers wearing thick neoprene suits might not hear or feel a standard alarm. JLC's solution was the Polaris's revolutionary triple-caseback system.

The Triple-Caseback Innovation

The Polaris's defining technical achievement is its three-part caseback:

1. Inner Caseback: The movement sits in a standard inner case. The alarm hammer strikes this inner caseback.
2. Air Gap: Between the inner and outer casebacks, there is a sealed air chamber that acts as a resonating cavity, amplifying the alarm's sound.
3. Outer Caseback: The final waterproof caseback seals the entire assembly, protecting the air gap and inner case from water intrusion.

This construction creates an acoustic amplification effect. The alarm sound resonates within the air chamber and is transmitted through the outer caseback and into the water or the diver's wrist, producing a noticeably louder alarm than a standard Memovox.

The engineering is elegant: no electronics, no batteries, just clever physics applied to a mechanical problem. It is pure JLC.

Design and Specifications

Case

• Diameter: 42mm (large for 1968, a size driven by the triple-caseback construction)

• Material: Stainless steel

• Water Resistance: 200 meters (20 ATM)

• Crown System: Two crowns (inner crown for time setting, outer crown for alarm setting)

• Crystal: Acrylic (original)

• Rotating Bezel: Internal rotating bezel operated by a secondary crown

Dial

• Color: Black with luminous markers

• Indices: Applied triangular markers at 12, 3, 6, and 9, with round dots elsewhere

• Hands: Broad, luminous hour and minute hands with a central alarm hand

• Luminous Material: Tritium (original examples)

Movement

• Caliber: JLC Caliber 825

• Type: Automatic with alarm function

• Frequency: 18,000 vph

• Power Reserve: Approximately 45 hours (timekeeping), separate barrel for alarm

• Alarm Duration: Approximately 20 seconds at full wind

Production and Rarity

The original Memovox Polaris (Reference E859) was produced from approximately 1968 to 1970. Total production is estimated at approximately 1,500 to 2,000 units, though exact figures are debated.

Several variants exist within the short production run:

• Different dial configurations (variations in text layout, luminous marker shapes)

• Different bezel markings

• Cases with and without the "POLARIS" designation on the caseback

Survival rates have been affected by the watches' intended use as diving instruments. Many were used hard, modified, or damaged. Finding an original, unmodified example in good condition is increasingly difficult.

Current Market Values (2024-2026)

Condition / Configuration	Estimated Value
Original, excellent condition, all original parts	$50,000 - $90,000
Original, good condition, minor service parts	$30,000 - $50,000
Original dial, restored case, working alarm	$20,000 - $35,000
Refinished dial, working alarm	$12,000 - $20,000
Non-working alarm, original cosmetics	$15,000 - $25,000

Value Factors

• Dial Originality: Original dials with intact tritium luminous markers and proper patina command the highest premiums. Refinished dials reduce value by 30-50%.

• Alarm Function: A working alarm is expected for top value. Non-working alarms can be repaired but indicate potential service issues.

• Case Condition: Unpolished cases with original proportions are preferred. The 42mm case shows polishing readily.

• Crown Originality: Both crowns should be original JLC. Replacement crowns are common and reduce value.

• Triple Caseback Integrity: The air gap chamber must be intact for the alarm amplification to function properly.

Condition Grading

• Museum Quality: Unpolished case, original dial with consistent patina, both crowns original, alarm functioning, caseback markings clear. Full documentation if available. A handful of examples may exist at this level.

• Excellent: Original dial, case with minimal polishing, alarm working, original crowns. The realistic target for serious collectors.

• Very Good: Original or honest service dial, case with some polishing, alarm working, mostly original components.

• Good: Service dial possible, noticeable case polishing, alarm may need attention. Still a significant and desirable watch.

The Modern Polaris

Jaeger-LeCoultre revived the Polaris name in 2018 with a modern collection that pays homage to the 1968 original. The modern Polaris line includes:

• Polaris Automatic: Time-only diver

• Polaris Chronograph: Diving chronograph

• Polaris Date: Date function diver

• Polaris Memovox: Modern alarm diver with the triple-caseback system

The modern Polaris Memovox retails for approximately $12,000 to $15,000, providing an accessible entry point for those who admire the concept but cannot acquire an original. The vintage original, however, carries a historical significance and collector cachet that no modern reissue can replicate.

Authentication

Counterfeit and "franken" (assembled from mixed parts) Polaris watches are a real concern:

• Verify the serial number with JLC's archives

• Examine the dial printing under magnification (original dials have specific printing characteristics)

• Confirm the movement caliber matches the reference

• Check the triple-caseback assembly for correct construction

• Verify crown spacing and operation (the two-crown system should operate smoothly and independently)

Investment Outlook

The original Memovox Polaris is a strong collector's watch investment:

• Limited production ensures permanent scarcity

• JLC's reputation as a top-tier manufacture supports brand value

• The modern Polaris revival has increased awareness of the vintage original

• Vintage dive watch collecting continues to grow

• The unique alarm-diver combination has no direct competitor

Why the Memovox Polaris Matters

The 1968 Jaeger-LeCoultre Memovox Polaris represents pure watchmaking ingenuity. It solved a real engineering problem (making a mechanical alarm audible underwater) with an elegant mechanical solution (the triple-caseback resonance chamber), all while maintaining the reliability and craftsmanship for which JLC is famous. It is a watch that rewards close examination, both as a mechanical achievement and as a design object. For collectors who value innovation over marketing, the Polaris is simply one of the best.

Browse all Watches →

Related Items