Maurice Lacroix Masterpiece Square Wheel Classic Men's Black Dial Power Reserve Mechanical Swiss Made Watch MP7158-SS001-301

by Maurice Lacroix
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Brand: Maurice Lacroix

Color: Black

Features:

  • Brushed stainless steel case (43 mm in diameter, 14 mm thick), Sapphire crystal screw-in case-back, Polished stainless steel bezel
  • Black sun-ray dial with the Maurice Lacroix logo at the 12 o'clock position, Silver-tone luminescent hands, Applied silver-tone indices
  • The square wheel and clover mesh to transfer power at the 6 and 9 o'clock positions and is also used to indicate the seconds, Power reserve display at the 3 o'clock position
  • Scratch resistant domed sapphire crystal with anti-reflective coatings on both sides, Swiss manual wind mechanical movement, Caliber ML 156, Power reserve of 45 hours
  • Water resistant to 5 ATM/50 meters/165 feet, Black crocodile leather strap, Push button deployment buckle

Details:
Maurice Lacroix Masterpiece Square Wheel

A square wheel? It sounds a crazy concept, especially when you consider that it was expec- ted to turn and interface with another wheel located adjacent and that second wheel was clover-shaped. However, Michel Vermot, a watchmaker and engineer at Maurice Lacroix, invented this concept.


The teeth on the two unusually shaped wheels would have to mesh perfectly to ensure reliable operation. Each tooth would require a unique angle to engage faultlessly without any loss in power transmission. Initially, the technology to create the unusually shaped, and very com- plex, wheels did not exist and the idea was simply recorded on paper.


Subsequently, LIGA (a German acronym for Lithographie, Galvanoformung, Abformung), a a state-of the art process, provided the solution for creating the small unusually shaped wheels. In collaboration with the Haute Ecole Arc, based in Le Locle, the ground-breaking design became a reality.


Watch Description

Brushed stainless steel case (43 mm in diameter, 14 mm thick), Sapphire crystal screw-in case-back, Polished stainless steel bezel, Black sun-ray dial with the Maurice Lacroix logo at the 12 o'clock position, Silver-tone luminescent hands, Applied silver-tone indices, The square wheel and clover mesh to transfer power at the 6 and 9 o'clock positions and is also used to indicate the seconds, Power reserve display at the 3 o'clock position, Scratch resistant domed sapphire crystal with anti-reflective coatings on both sides, Swiss manual wind mechanical movement, Caliber ML 156, Power reserve of 45 hours, Water resistant to 5 ATM/50 meters/165 feet, Black crocodile leather strap, Push button deployment buckle, Model number: MP7158-SS001-301.