Having reviewed both Lange’s and Ferrier’s annual calendars in the previous days, today it’s time for a face-off, a chance for these two mid-weight complication champs to engage in a mock battle. The two contestants are clearly very beautiful watches, perfectly matched in functionality and mechanical integrity, so please take a ringside seat and see if you agree with our verdict in the battle of annual calendars pitting the A. Lange & Söhne 1815 Annual Calendar versus the Laurent Ferrier Annual Calendar School Piece.