The Tissot Seastar 2000 Professional

An automatic watch is powered by the energy of the person who wears it. Wrist movement enables the mechanism to run. The Powermatic 80 movement boasts 80 hours of power reserve, which is enough to continue telling time accurately even if the watch is not worn for three days. It is an innovative movement that outperforms the competition, whose movements general provide 1.5 days of power reserve... More here.

If you are not into watches an asking price of £895 may seem very high for any timepiece. I cannot, however, express enough how impressive these specs are for the price when compared to almost the entirety of the rest of the industry. Take a look at the Oris Aquis (£1,600) and it is hard to choose between the two, but I think I would still go for the Tissot regardless of price.