Jaeger-LeCoultre Caliber 610 – Technical Overview from Document 1126_JLC (Pages 610–611)

The Jaeger-LeCoultre Caliber 610, detailed in document 1126_JLC on pages 610–611, is a distinguished manual-winding mechanical movement known for its refined craftsmanship and reliable performance. These pages provide an in-depth technical analysis of the caliber’s architecture, key components, lubrication points, and servicing guidelines.

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

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

• Two-bridge construction allowing structural rigidity and simplified servicing

• Efficient gear train and barrel design ensuring smooth power delivery

• Shock protection on the balance staff for durability and impact resistance

• Smooth manual winding and setting mechanisms designed for user-friendly operation

Servicing and Lubrication Notes

• Lubrication: Synthetic oils applied precisely to escapement pivots, pallet jewels, and balance bearings; light grease on barrel arbor and winding components

• Regulation: Target amplitude of 250°–280°, beat error under 0.8 ms for accurate timekeeping

• Small seconds mechanism: Check proper engagement and secure fitting of the fourth wheel pinion and seconds hand

• Keyless works: Regular inspection to ensure smooth crown operation during winding and time setting

Application

Caliber 610 was primarily used in:

• Classic Jaeger-LeCoultre manual-wind dress watches

• Models featuring elegant small seconds displays

• Watches produced in stainless steel or precious metals with case diameters generally around 34–36 mm

Conclusion

Pages 610–611 of document 1126_JLC provide essential technical information for the Jaeger-LeCoultre Caliber 610, underscoring its significance as a reliable, precise, and serviceable manual-winding movement. Its combination of traditional watchmaking craftsmanship and practical design continues to make it a valued caliber among collectors and watchmakers.