As the name suggests, this watch is equipped with an annual calendar. This complication recognises months with 30 and 31 days, progressing automatically to the 1st of the month as appropriate. Manual adjustment is required only once a year, on the 1st of March. The day display is easily set through a pusher on the left side of the case, at 10 o’clock. All the other settings are easily controlled by a pull of the crown and rotating it accordingly, with no need for any tools.

The École case, inspired by Laurent's studies while a younger man, also pays tribute to period pocket watches, from the time when pioneer watchmakers began transforming them into wristwatches.

The calibre 126.01 is at the heart of the "Série Atelier II". This hand-wound movement incorporates a Swiss lever escapement and offers a power reserve of up to 80 hours. The power reserve indicator is placed on the movement and visible on the caseback. Much appreciated by purists, the long-blade ratchet, characteristic of LAURENT FERRIER manual movements, here boasts a polished bassiné finish, handcrafted in the brand's own workshops.