# 1 of the robust watches - extremely magnetic field protected: Omega Seamaster Aqua Terra 150 M in green
Magnets are harmful to watches because parts of the movement can become permanently magnetic, which affects the accuracy of the watch. The invisible forces also lurk in everyday life; they are based on loudspeaker boxes or electric motors. Omega offers the best protection against this with its “Master Chronometer” manufacture movements such as the automatic caliber 8900 with co-axial escapement. There, non-magnetic materials ensure that the watches can withstand magnetic field strengths of up to 15,000 Gauss despite the glass back. That is 15 times more than a soft iron inner case can achieve. The Omega Seamaster Aqua Terra 150M is made of stainless steel and has a diameter of 41 millimeters. The model is waterproof up to 15 bar. The watch costs 5,600 euros on a stainless steel bracelet.
# 2 of the robust watches - extremely salt water resistant: Oris Dive Control Limited Edition
With the Dive Control Limited Edition , a further development of the ProDiver watch developed for professional divers just like some smart branded watches, Oris is symbolically returning to the depths of the seas. Because the 51 millimeter watch is pressure-resistant up to 100 bar, which corresponds to the conditions in 1,000 meters of water. The case is made of saltwater-resistant titanium grade 2, is black DLC-coated and therefore more scratch-resistant than pure titanium. The unidirectional rotating bezel, scaled to the minute, is made of ceramic and features the Oris-patented Rotation Safety System (RSS), a special technology that securely locks the rotating bezel during a dive. The Oris caliber 774 is based on the Sellita automatic movement SW 500. A surprisingly simple and interesting solution is the 60-minute chronograph counter at twelve o'clock with double scale and a pointer with two ends of different length. Matching the yellow accents, the watch can be worn on the bright yellow rubber strap in addition to the black strap is delivered in a waterproof box. The whole thing is only available 500 times at a price of 4,800 euros.
# 3 of the robust watches - extremely low pressure resistant: Stowa Flieger TESTAF T01
While too much pressure will destroy the watch, too little pressure can do the same. If the external pressure is much lower than the internal pressure, the glass can be pushed out or even explode. Such a pressure drop in a high-flying passenger aircraft due to a defect occurs around 40 to 50 times a year. The technical standard for pilot's watches TESTAF certifies that a wristwatch can completely replace the time measuring instruments in the aircraft for the pilot. This also means that the timepiece is vacuum-proof. The Flieger TO1 TESTAF from Stowa is a TESTAF-certified pilot's watch . The model has a 46 millimeter titanium case. This is 20 bar waterproof and houses thatAutomatic caliber Eta 2824-2 . The dial of the model is painted matt black and has noctilucent indexes and hands. The three-hand watch costs 1,650 euros on the leather strap.