The first watch we've selected conforms exceedingly well to the standards we have set out. With a case built out of the same materials as the outer hulls of submarines, you know this is steel you can count on to be both anti-magnetic and resistant to corrosion. The bezel is uni-directional and made of the same steel, with machined indices as opposed to inserts. Considering that this watch is resistant to 1,000 metres (tested by a lab that tests depth-worthiness of submarines, no less), it exceeds our standards by a fair bit. With a flip lock safety clasp, a double push button deployant clasp and Superluminova on markers and hands, it appears that Sinn has done this by the book, all the way.

Uniquely, IWC’s entire Aquatimer range uses rotating uni-directional inner bezels as opposed to the standard grooved external bezels. The inner bezel is adjusted via the lower crown, which does not screw down and features a complex self-sealing mechanism. Made of titanium, the Aquatimer Automatic 2000 is able to plunge to depths of up to 2,000 metres, completely shattering our humble requirements. Although the case is a massive 14.8mm thick, the weight is almost negligible thanks to the titanium. It also features a push button safety clasp and luminous elements on the hands, dial and inner bezel.