The 118 is the movement model number. The 118 is based on the PF110 which is one of the first (if not the first) in-house movment from the house of Parmigiani. The PF110 saw the light of the day in the Ionica model. Practically 8 days of power reserve, the PF110 is also decorated to very very high standard, with wide mirror polished anglage, sharp interior angles, geneva stripes etc., . Glad you liked the pictures M4 - appreciated.