Panerai OP XVIII
Movement by Panerai
Self-winding chronograph movement on Valjoux basis. With rattrapante function. Produced by La Joux-Perret as their Caliber 8601 RAC. It is unusual in that it has a column wheel rather than the cam system typically seen on Valjoux 7750-based movements.
The Panerai OP XVIII is for instance used with the following models: