Jaeger-LeCoultre Caliber 220 – Technical Overview from Document 1086_JLC

The Jaeger-LeCoultre Caliber 220 is a distinguished manual-winding mechanical movement, notable for its use in some of JLC’s most prestigious timepieces, including early versions of the Reverso and other high-end dress watches. Document 1086_JLC provides a detailed technical exposition of this caliber, covering its design, key features, and servicing guidelines.

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 38–40 hours

• Diameter: Approximately 28.3 mm

• Height: Approximately 3.85 mm

The Caliber 220 is appreciated for its robust construction and refined finishing, suitable for elegant timepieces with classic styling.

Movement Architecture and Features

According to document 1086_JLC, key elements of Caliber 220 include:

• Small seconds subdial, typically positioned at 6 o’clock

• Two-quarter plate design, offering stability and ease of servicing

• Reliable gear train and barrel system engineered for consistent energy delivery

• Shock-protected balance wheel with precise index regulator for fine timing adjustments

• Traditional keyless works optimized for smooth crown winding and setting

The movement strikes a balance between durability and refinement, serving as a workhorse in several JLC collections.

Servicing Notes

• Lubrication: Critical points include the escape wheel pivots, pallet fork jewels, and balance staff, using high-grade synthetic oils; barrel arbor and crown wheel receive light grease

• Regulation: Ideal amplitude ranges from 250° to 280°, with beat error kept below 1 ms

• Small seconds function: Ensure proper alignment and clearance of the fourth wheel and seconds pinion to avoid stuttering or excessive play

• Keyless works inspection: Regular checks for wear in the setting lever spring and sliding pinion improve winding and setting smoothness

Applications

Caliber 220 was used primarily in:

• Jaeger-LeCoultre Reverso models during the mid-20th century

• Other high-end dress watches requiring reliable manual-wind movements with small seconds

• Timepieces crafted in precious metals or stainless steel, often between 34–36 mm in diameter

• Watches emphasizing classic elegance and mechanical reliability

Conclusion

The Jaeger-LeCoultre Caliber 220, as described in document 1086_JLC, represents a hallmark of traditional Swiss watchmaking with a refined manual-winding movement that combines reliability, elegance, and precise timekeeping. Its small seconds complication and robust construction make it a favored caliber among collectors and watchmakers specializing in vintage Jaeger-LeCoultre timepieces. The caliber embodies the brand’s commitment to mechanical excellence and classic design.