Leroy caliber L200AL
Hand-wound movement presented at BaselWorld 2015, feauring a direct impulse escapement, a balance spring with a double terminal curve and a 'Brun Cage', enabling the balance-spring stud to be modified by 360 degrees. It features jumping seconds, though not in the regular sense; the so-called 'duplex jumping seconds' make a big jump followed by a shorter jump. The power reserve is indicated through a diamond-shaped aperture on the dial at 9 o'clock.
It is said the theoretical power reserve of this movement is 150 hours; it was however limited at 98.
The present version was created especially for Only Watch 2015; its movement plates are made of aluminium