Tissot ran a worldwide campaign, 'Tissot, This is Your Time' with a new tagline and visuals. The company motto/slogan of Tissot is "Innovators by Tradition". Tissot introduced the first mass-produced pocket watch as well as the first pocket watch with two time zones in 1853 and the first anti-magnetic watch, in 1929–30. The Tissot company was also the first to make watches out of plastic (Idea 2001 in 1971), stone (the Alpine granite RockWatch in 1985), mother of pearl (the Pearl watch in 1987), and wood (the Wood watch in 1988). Tissot introduced its first tactile watch, with "T-Touch," technology in 1999; watches containing this technology have touch-sensitive sapphire crystals to control various functions like compass, barometer, altimeter and thermometer. In 2014 the T-Touch Expert Solar and T-Touch Lady Solar had 25 functions. In December 2018, World Wide Fund for Nature (WWF) released an official report giving environmental ratings for 15 major watch manufacturers and jewelers in Switzerland. Tissot, along with 7 other manufacturers including Omega, Rolex and Longines, was given the lowest environmental rating as "Latecomers/Non-transparent", suggesting that the manufacturer has taken very few actions addressing the impact of its manufacturing activities on the environment and climate change. There are concerns over the lack of transparency in manufacturing activities and the sourcing of precious raw materials such as gold, which is a major cause of environmental issues such as pollution, soil degradation and deforestation. The situation is especially serious in the developing countries which are top producers of gold, including China, Russia and South Africa. It is estimated that the watch and jewelry sector uses over 50% of world's annual gold production (over 2,000 tons), but in most cases the watch companies are not able to or are unwilling to demonstrate where their raw materials come from and if the material suppliers use eco-friendly sourcing technologies. Tissot has partnered with a wide range of celebrities from basketball players, actors, cricket players, to MotoGP racers to be their brand ambassadors. As of 2018, brand ambassadors include Tony Parker, Liu Yi Fei, Virat Kohli, Deepika Padukone, Huang Xiaoming, Jorge Lorenzo, Thomas Luethi, Marc Márquez and recently Rana Daggubati. Tissot watches have been worn by Catherine, Duchess of Cambridge, Sarah Bernhardt, singer Carmen Miranda, Grace Kelly, Elvis Presley and Nelson Mandela.