Unmistakeable originals of chronometry are the undisputed specialty of the IWC Schaffhausen watch factory in Schaffhausen, in north-east Switzerland: the famous Da Vinci with its perpetual calendar, is one such. These naturally included the first "Grande Complication" for the wrist, but also the super-antimagnetic "Ingenieur" and the diver's watches, which are capable of withstanding water
pressure even down to a depth of 2000 metres.