Jaeger-LeCoultre Caliber 210 – Technical Overview from Document 1083_JLC

The Jaeger-LeCoultre Caliber 210 is a manual-winding mechanical movement known for its reliability, precision, and classic design. Document 1083_JLC provides detailed technical specifications, structural insights, and servicing information critical for horologists and collectors.

Technical Specifications

• Type: Manual-winding

• Functions: Hours, minutes, small seconds

• Jewels: 17

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

• Power Reserve: Approximately 40 hours

• Diameter: Approximately 27.0 mm

• Height: Approximately 3.5 mm

Movement Architecture and Features

• Features a small seconds subdial positioned at 6 o’clock, driven by the fourth wheel and pinion

• Constructed with a two-bridge design providing rigidity and facilitating maintenance

• Equipped with a robust gear train and barrel for consistent energy delivery

• Includes a shock protection system on the balance staff for durability

• Manual winding and setting mechanisms designed for smooth, reliable operation

Servicing Notes

• Precise application of synthetic oils at escapement pivots, pallet jewels, and balance staff is essential

• Light grease is applied on the barrel arbor and winding gears

• Regulation aims for amplitude between 250° and 280°, with beat error kept under 0.7 ms

• Small seconds mechanism must be checked for proper seating and smooth operation

• Keyless works require regular inspection to maintain smooth crown winding and time setting

Applications

• Commonly used in Jaeger-LeCoultre dress watches during the mid-20th century

• Found in models crafted from stainless steel or precious metals, sized typically between 34 and 36 mm

• Valued by collectors for its blend of traditional aesthetics and mechanical reliability

Conclusion

The Jaeger-LeCoultre Caliber 210, as detailed in document 1083_JLC, reflects the brand’s commitment to precision engineering and timeless design in manual-winding movements. Its reliable performance and ease of servicing continue to make it a favored choice among vintage watch enthusiasts and professional watchmakers alike.