Mat Watch Diver Chrono AG5 CH 1. Delivered with 3 interchangeable straps. The SEA-AIR-LAND adventure started with a special order for watches for police officers belonging to RAID, the special French police enforcement unit. These watches were expertly crafted to meet the needs of these security professionals. The originality of their design has enabled them to fulfil every requirement of the members of the French Special Forces. MER-AIR-TERRE have proved their worth in action in the activities of the various military units deployed in the French armys many theatres of operation.