A new movement from the Swiss manufacture La Joux-Perret, the G120 is a new three-hand automatic calibre with small seconds, offering a generous 68-hour power reserve and a proven architecture.
This ultra-precise movement, with 24 jewels and measuring 24.6 mm x 4.45 mm, beats at 4 Hz (28,800 vibrations per hour).
In practice, our highly skilled French watchmakers at the HUMBERT-DROZ workshop assemble the calibre’s 280 components in Besançon before regulating it and casing it in MARCH LA.B watches.
Fitted with a hacking seconds function, it is extremely precise, varying between -4 and +6 seconds per day, and offers a 68-hour power reserve, commonly known as “weekend-proof”, allowing the watch to run from Friday evening to Monday morning without being worn by its lucky owner.
MARCH LA.B positions itself as a pioneer of “responsible watchmaking”, bringing skills and forces together for a movement 100% machined in Switzerland and 100% assembled in France.
The dial of the MANSART is octagonal, like the case. It is intentionally simplified and features fine, elegant indices.
The M logo is a finely cut appliqué.
The hands are slender to allow the overall design to breathe.
The new MANSART is now equipped with the Swiss automatic G121 movement with small seconds. Its horizontally guilloché dial houses an octagonal sub-dial for an ultra-coherent and elegant look.
All MARCH LA.B watch cases meet scrupulously respected construction criteria. Always polished and brushed, they catch the ambient light to bring your watch to life.
The 35 mm octagonal MANSART case, 10.2 mm thick, is a true piece of architecture.
A stack of angular layers, with an octagonal guilloché crown set at 4 o’clock that echoes the shape of the case.
The bracelet is integrated into a lugless case for a more elegant, monolithic whole.
The anti-reflective sapphire crystal, virtually scratch-proof, sits almost flush to keep a sophisticated unity.



Les bracelets
Une montre, plusieurs allures
Acier, cuir ou tissé : chaque bracelet MARCH LA.B est dessiné pour épouser nos boîtiers, et se change en quelques secondes.















