On Turbo insert №46, a very unusual Porsche 911 Turbo in bodywork 930 is depicted. Firstly, it has a targa body type, and secondly, — unique recessed headlights a-la Porsche 928. 
The point is that it features the rarest Porsche Turbo Targa from the BB tuning studio. Only a few such cars were produced in 1977. 
BB is the brainchild of the famous German designer Rainer Buchmann.
He was one of the first to take on tuning the Porsche 911 Turbo, and he especially loved refining the 911 Turbo Targa. Indeed, such a version existed in its time, but only 300 cars were assembled. 
Besides the modified ‘nose’, the BB Porsche Turbo Targa is recognizable by its side stamping. Additionally, the power of its 3.3-liter turbo-six was increased to 330 hp. Acceleration to 100 km/h took 4.9 s, and the maximum speed was 270 km/h.
As you understand, the data on the insert is inaccurate. 
In addition to the Porsche Turbo Targa, BB also produced regular 911s in the same style. Typically, the cars were custom-made.