AX Factory Jaeger-LeCoultre Master Tourbillon 1662451 42mm
The AX Factory Jaeger-LeCoultre Master Tourbillon 1662451 is a 42mm automatic mechanical tourbillon watch powered by a Cal.798 automatic movement.
The case measures 13mm in thickness, while the mechanical configuration incorporates a functional tourbillon and an approximate 45-hour power reserve. A sapphire crystal, Italian calfskin leather strap, folding clasp, and 30-meter water-resistance specification complete the configuration.
42mm Case
The Master Tourbillon 1662451 uses a 42mm case with a thickness of 13mm.
These dimensions provide sufficient space for the tourbillon display while maintaining the traditional round-case architecture associated with a dress-oriented mechanical watch.
Functional Tourbillon
The principal mechanical complication is a functional tourbillon.
The tourbillon incorporates the regulating components into a rotating cage, creating continuous mechanical motion while the watch is running.
Its exposed presentation also makes the tourbillon one of the primary visual elements of the dial.
Cal.798 Automatic Tourbillon Movement
The watch is powered by a Cal.798 automatic mechanical movement configured with a functional tourbillon.
Unlike a manual-winding tourbillon, the automatic winding system uses normal wrist movement to provide energy to the movement during regular wear.
The movement can also be manually wound through the crown when necessary.
45-Hour Power Reserve
The Cal.798 has an approximate 45-hour power-reserve specification.
This represents the amount of running time available from a sufficiently wound movement when the watch is no longer receiving additional energy from automatic winding.
Sapphire Crystal
The front of the watch is protected by a sapphire crystal.
Its transparent surface provides a clear view of the dial and exposed tourbillon mechanism while offering good resistance to ordinary surface scratching.
Italian Calfskin Leather Strap
The watch is fitted with an Italian calfskin leather strap.
The leather construction complements the traditional Master-series design and provides a softer alternative to a metal bracelet.
Folding Clasp
The leather strap is secured using a folding clasp.
The folding mechanism allows the strap to open widely for putting on or removing the watch while reducing the need to repeatedly bend the leather around a conventional pin buckle.
30-Meter Water-Resistance Specification
The watch carries a 30-meter water-resistance specification.
This level is best treated as basic everyday splash protection rather than suitability for swimming, showering, or diving.
Intentional immersion should be avoided, particularly because the watch is fitted with a leather strap.
Technical Specifications
Specification Details
Factory AX Factory
Brand Jaeger-LeCoultre
Collection Master
Reference 1662451
Case Diameter 42mm
Case Thickness 13mm
Movement Cal.798
Movement Type Automatic Mechanical
Complication Functional Tourbillon
Power Reserve Approx. 45 Hours
Crystal Sapphire Crystal
Water Resistance 30m
Strap Italian Calfskin Leather
Clasp Folding Clasp
Automatic Tourbillon Architecture
The main technical characteristic of the AX 1662451 is the combination of an automatic mechanical movement and functional tourbillon.
The Cal.798 provides automatic winding while simultaneously driving the tourbillon mechanism. This separates the model mechanically from conventional three-hand Master configurations and from tourbillon watches that require manual winding.
The approximately 45-hour power reserve provides the movement’s supplied running-time specification when fully wound.
Wearing and Care
With dimensions of 42 × 13mm, the watch has a noticeable wrist presence while retaining a traditional round-case profile.
The tourbillon mechanism contains numerous small moving components, so strong impacts and powerful magnetic fields should be avoided.
For the leather strap, prolonged contact with water, sweat, and high humidity should be minimized. The 30m water-resistance specification should not be interpreted as swimming or diving capability.
Frequently Asked Questions
What is the reference number?
The watch reference is 1662451.
What is the case size?
The case measures 42mm in diameter and 13mm in thickness.
What movement does the AX 1662451 use?
It uses a Cal.798 automatic mechanical movement.
Is the tourbillon functional?
Yes. The watch incorporates a functional mechanical tourbillon.
Is the movement automatic or manual winding?
The Cal.798 is an automatic mechanical movement.
What is the power reserve?
The supplied power-reserve specification is approximately 45 hours.
What type of crystal does it use?
The watch uses a sapphire crystal.
What type of strap is fitted?
It is fitted with an Italian calfskin leather strap and folding clasp.
Is the watch suitable for swimming?
Its supplied water-resistance specification is 30 meters, which is better treated as basic everyday splash protection rather than swimming or diving capability.
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