Jaeger-LeCoultre Caliber 222 – Technical Overview from Document 1089_JLC

The Jaeger-LeCoultre Caliber 222 is a distinguished manual-winding mechanical movement, renowned for its precision and craftsmanship. This caliber was widely used in mid-20th-century wristwatches, including some of JLC’s most iconic dress models. Document 1089_JLC provides a comprehensive technical guide detailing the movement’s design, components, and servicing procedures.

Technical Specifications

• Type: Manual-winding

• Functions: Hours, minutes, small seconds

• Jewels: Typically 17–19

• Frequency: 18,000 vibrations per hour (2.5 Hz)

• Power Reserve: Approximately 40 hours

• Diameter: Approximately 28.3 mm

• Height: Approximately 3.85 mm

Caliber 222 is recognized for its robust build, refined finishing, and reliable timekeeping, suitable for elegant wristwatches.

Movement Architecture and Features

Based on document 1089_JLC, Caliber 222 includes:

• Small seconds subdial positioned at 6 o’clock, powered by the fourth wheel

• Two-quarter plate design, enhancing rigidity and facilitating servicing

• Robust gear train and barrel system ensuring consistent power delivery

• Shock protection system on the balance staff, typically Incabloc

• Manual winding and setting mechanism engineered for smooth and reliable operation

The movement is appreciated for its classical design and dependable mechanical performance.

Servicing Notes

• Lubrication: Synthetic oils are applied to escape wheel pivots, pallet fork jewels, and balance staff; light grease is used on barrel arbor and winding gears

• Regulation: Ideal amplitude ranges between 250° and 280°, with beat error maintained below 1 ms

• Small seconds mechanism: Verify correct engagement and clearance of the fourth wheel pinion to prevent hand stutter or excessive play

• Keyless works: Regular inspection of setting lever spring and sliding pinion is recommended to ensure smooth crown function

Applications

Caliber 222 was employed in:

• Jaeger-LeCoultre dress watches of the mid-20th century

• Timepieces emphasizing traditional aesthetics with small seconds complication

• Watches made in stainless steel and precious metals, often measuring between 34–36 mm in diameter

• Models favored by collectors for their vintage character and mechanical robustness

Conclusion

The Jaeger-LeCoultre Caliber 222, as detailed in document 1089_JLC, stands as a hallmark of precision and craftsmanship in manual-winding mechanical movements. Its combination of classic design, reliable construction, and ease of maintenance makes it a valued caliber among vintage watch enthusiasts and professional watchmakers. It embodies Jaeger-LeCoultre’s dedication to enduring quality and mechanical excellence.