The Porsche 356 was the first produced production automobile of Porsche. In late 1959 significant styling and technical refinements gave rise to the 356 B (a T5 body type). The mid-1962 356 B model was changed to the T6 body type (twin engine lid grilles, an external fuel filler in the right front wing/fender and a larger rear window in the coupé).
The Porsche factory did not call attention to these quite visible changes with a different model designation. However, when the T6 got disc brakes, with no other visible alterations, they called it the model C, or the SC when it had the optional extra powerful engine. A unique “Karmann hardtop” or “notchback” 356 B model was produced in 1961 and 1962. The 1961 production run (T5) was essentially a cabriolet body with the optional steel cabriolet hardtop welded in place.