The item is manufactured by Tecno Tubo Torino of Italy which labelled products under "3ttt" brand.

3T was originally called Tecnologia del Tubo Torinese (Turin Tube Technology), taking its name from the city of Turin, where it was founded in 1961 by Mario Dedioniggi. Though written '3ttt', it’s usually called Triple T.

Later version of the Grand Prix bar with sleeve type reinforcement, but dual groove for aero cables.  Likely of mid/late 90's production.