By its very nature, this type of watch is often associated with aviation, as in 1947, for example, when Mido equipped the pilots who set the new flight record for circumnavigating the globe to test the watch "in the field". Mido's links with the world of aviation are very strong. During the Second World War, Walter Schaeren, the son of Mido's founder, was mobilised as a pilot in the Swiss Air Force and received his wings as a lieutenant in 1942. Furthermore, in the 1940s, Mido received a certain number of testimonials from soldiers and pilots, particularly from US forces, who could all attest to the remarkable solidity, water resistance and robustness of Mido watches, which continued to work perfectly even when subjected to the most extreme conditions. It goes without saying that publicity for Mido largely echoed these laudatory testimonials.