Jaeger-LeCoultre Caliber 862: Overview from Technical Document 1152_JLC

The Jaeger-LeCoultre Caliber 862 is a refined manual-winding mechanical movement best known for its use in women’s watches and ultra-slim dress timepieces. Document 1152_JLC, particularly focused on this caliber, provides an in-depth technical guide intended for professional servicing, with attention to the intricate assembly, lubrication points, and component identification required for maintaining this compact movement.

Technical Specifications

• Type: Manual-winding

• Functions: Hours, minutes (no seconds hand)

• Jewels: Approximately 17

• Frequency: 21,600 vibrations per hour (3 Hz)

• Power Reserve: Around 38–40 hours

• Diameter: ~15.3 mm

• Height: ~2.9 mm

Its ultra-compact and flat construction makes it ideal for slim-cased timepieces, especially in the realm of haute joaillerie and ladies’ models.

Movement Characteristics

The Caliber 862 was designed with minimalism and precision in mind:

• Two-hand display (hours and minutes)

• No complications, which allows for enhanced slimness and simplified servicing

• Thin barrel and mainspring, designed for compact energy storage

• Precise escapement regulation, despite the small size

The construction emphasizes efficient space use without sacrificing mechanical reliability. Because of the limited dimensions, every component is miniaturized and tightly arranged, requiring skilled watchmakers for handling and maintenance.

Insights from Document 1152_JLC

The document includes:

• Exploded views and part numbers, critical for ordering or identifying specific components such as the crown wheel, setting lever, and escape wheel

• Lubrication chart, showing exact oiling points and types of lubricants for each area—especially critical in a movement of this size, where over-lubrication can easily disrupt performance

• Assembly sequences, providing instructions on the proper order of reassembling plates, bridges, and keyless works

• Balance wheel adjustment guidance, including shock protection system details and fine regulator positioning

Finishing and Visual Design

Though small and utilitarian in layout, the Caliber 862 is finished to Jaeger-LeCoultre standards:

• Circular brushing or perlage on plates

• Polished screws and jewel settings

• Elegant beveling on key edges, even at this scale

The decoration remains subtle but reflects the high level of craftsmanship JLC applies, even to its smallest movements.

Application in Watches

The 862 movement has been used in:

• Women’s wristwatches, especially those in the classic “cocktail” or jewelry watch category

• Slim dress watches, where space constraints required movements under 3 mm thick

• High-jewelry creations, often in white gold, yellow gold, or platinum cases with precious stones

It is most often found in models from the late 20th century, particularly the 1980s and 1990s, when miniaturized mechanical movements were in high demand for luxury women’s watches.

Servicing Considerations

Due to its miniature size, servicing Caliber 862 requires:

• High-magnification tools

• Steady manual dexterity, as parts are small and delicate

• Precise lubrication, especially for the escapement, gear train, and keyless works

• Caution with shock protection components, which are easily displaced during handling

Conclusion

The Jaeger-LeCoultre Caliber 862, as detailed in technical document 1152_JLC, exemplifies the brand’s mastery of miniaturized mechanical engineering. Its compact design, efficient two-hand function, and slim profile make it a cornerstone in the brand’s collection of elegant women's watch movements. Watchmakers appreciate its precision, while collectors value its rarity and refinement in high-end vintage timepieces.