Once upon a time, in Switzerland, there was a "chronometry contest" putting the best watchmakers of Switzerland against each other to make the most accurate mechanical watch and have it certified by the observatory of Neuchâtel (observatories were at the time the entities in charge of giving the most accurate time, based on reference star observations).
It worked for a time, and manufactures employed experienced, legendary even, watchmakers and specialized "watch setters" to create and tune to the best possible extent a few experimental watch movements. They would be sold as collection pieces, the firm would gain boasting rights in its advertising, and the experience informed the design and tuning of more mainline movements.
By the end of the history of (the revival* of) this concours, the winner was always Tissot, a second-rate company. What hides behind Tissot is ETA, a huge watch movement manufacturer for all of the Swatch group (dozens of brands, from Omega to the worst no-name stuff you can find).
What they were doing to win was just to pick the best watch movements out of the millions of basic, bland, uninteresting "workhorse" ones they were producing each year. Just by chance, there was always one combination of the hundreds of components, each with their manufacturing tolerances and variations, that would fit all together to make an exceptionally accurate movement.
In the end, yes, Tissot won repeatedly. But the concours is dead. And Tissot is still a second-rate brand making second rate watches. Nobody is interested by their watch movements, no collector, no historian, no customer.