Tissot. A limited edition stainless steel automatic world time wristwatch Heritage Navigator World Time, Ref Z197 Limited Edition Number 0165/1800, Circa 2010 - Bonhams,Tissot - 1950s Tissot Navigator World Time 18K YG (Ref. 4002-2) 'Cal 28.5N-21T',Rare 1951 Tissot Navigator World Time ref. 4002-1 in Steel – 1st Gener – Amplitude,Horological Meandering - TISSOT NAVIGATOR 2160,Rare 1951 Tissot Navigator World Time ref. 4002-1 in Steel – 1st Generation