Jaeger-LeCoultre · Master Control
Jaeger-LeCoultre Master Control Calendar (reference Q4148421) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.
A 40 mm complication watch with automatic movement (JLC 866) and 50 m water resistance.
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Strengths and considerations
Strengths
- Complication design; Automatic movement; 50 m stated water resistance.
Considerations
- Buyers prioritizing low purchase and service costs.
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Manufacturer and technical references used to verify this watch specification.
Specifications last verified: 2026-08-14.
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