Detecma is an acronym for Design, Technique and Mathematics. These three values were united for the first time in 1967, the year when the Physicist Professor Tullio Regge, renown as one of the most influential scientific thinkers of the XX century, transformed a mathematical quartic function into a volume with intentionally ergonomic characteristics. It was the first object realized with the help of an electronic calculator. It was an epic event to which Gufram decided to pay tribute by putting again into production a seat, which has revolutionized the history of design through its planning approach. Six versions that, put together, return all the tones in the world.