Although Steger Experienced used Rolex watches for past expeditions (he was only the fourth person in background to achieve both equally Poles), for your 1989 expedition, he used a quirky watch produced specifically for him by the French model, Yema. The watch, called the Bipole Duopoly had a 48mm titanium https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/