Rado is a Swiss watchmaker that has been in business since 1917. It is known for its innovative designs and use of materials such as ceramic, sapphire crystal, and titanium. OMEGA is another Swiss watchmaker that has been in business since 1848. It is renowned for its precision and accuracy and is the official timekeeper of the Olympic Games. Cartier is a French luxury goods company that was founded in 1847. It is known for its high-end watches and jewelry, and is one of the most recognizable names in the luxury watch industry. All three of these companies are competitors to Rolex, the world's most famous watchmaker.