While Steger Experienced employed Rolex watches for past expeditions (he was just the fourth person in history to reach the two Poles), for your 1989 expedition, he utilised A unusual watch produced especially for him from the French manufacturer, Yema. The watch, called the Bipole Duopoly had a 48mm titanium https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/