


It maintains its performance even when placed 1 centimeter from a device emitting a magnetic field. 9051 movement in this model uses anti-magnetic materials for the balance spring and surrounding components to boost the magnetic resistance of the watch. The case is made of lightweight, scratch-resistant Super Titanium™*¹, and is thinner than the original model to ensure a more comfortable fit on the wrist. The watches have a guardless crown design, and the 41.0 mm diameter (design specifications) is the same as the original model. The sapphire glass has a flat cut top and a domed underside, and the sides of the glass are beveled to provide a chunky, retro look. These new models take design cues from the original Challenge Diver design, but their external features and the movement inside have been updated for contemporary use. The number of barnacles attached to the watch hinted that it had been in the ocean for a number of years. The watch was covered in barnacles after being submerged in the Pacific Ocean, but the movement inside had remained protected from the seawater and was still ticking. In 1983, a Challenge Diver was found on Long Reef Beach in Australia. CITIZEN’s archives contain a fascinating story about a lost Challenge Diver watch.
