Briston's diving watches all feature the distinctive " square-cambered " shape of the Clubmaster line. The Clubmaster Diver is immediately recognisable by the design of its 42 mm case with 2 crowns on the right-hand side, a nod to the Supercompressor watches of the 1960s. The "Yachting" version features a genuine walnut dial inspired by the decks of boats. Its robust case is water-resistant to 200 metres. The Clubmaster Diver Pro can be identified by its notched ceramic bezel. Its 44 mm case also houses the robust NH35A automatic calibre. But combined with an ultra-resistant sapphire crystal, it withstands pressures of over 30 bars and is water-resistant to 300 metres.