The LW.01M and LW.01A are powered by a ETA 2000.M1 modified by Schwarz-Etienne for MING, which were picked with an
link attempt to make a thin watch for the brand's fourth anniversary. That
link idea
link morphed into a challenge to make a light watch, then the lightest, but all that was delayed with a years-long years exhaustive amount of testing and metallurgic experimentation.