5C Factory proudly presents a refined aesthetic masterpiece from the Jaeger-LeCoultre Master Series — model Q4148420, featuring a high-end market version with a true small seconds display at 6 o’clock.
Key Details
Case Design
Case size: 40mm × 12mm, designed to balance slimness with structural presence. The dial features a slightly domed “box-shaped” curvature, repeatedly refined from the side profile to closely replicate the visual harmony of the original design while preserving its timeless character.
Functional Layout
12 o’clock: dual apertures displaying weekday and month
6 o’clock: sub-dial for small seconds with moonphase display
Perimeter: date hand display
All key complications are faithfully reproduced, emphasizing both visual balance and functional integrity.
Caseback & Clasp Engineering
The folding clasp is designed with a seamless curved structure, ensuring no visible gaps when viewed from the side. The curvature and ergonomics closely match the original, providing a comfortable wrist fit.
Movement
Powered by a 5C Factory customized modified Jaeger-LeCoultre-style 866AA automatic movement, engineered for stable timekeeping and refined performance.
A meticulously refined creation that blends simplicity with mechanical complexity—an embodiment of “minimalist on the surface, intricate at its core.”




