Originally presented as the ’porsche 901 classic’ at the 1963 frankfurt motor show - eventually renamed to the ‘911’, as french car maker peugeot objected to porsche using any three digit number where the middle number was 0 - marks its 50th anniversary with the introduction of the '2013 porsche carrera 911 4S’. 

To commemorate 'the most successful sports car ever produced - of which over 820,000 were sold’, the official porsche museum in stuttgart will host four special exhibitions, including an early-model 911 turbo coupe, 1981 911 cabriolet concept, a 1997 GT1 straßen version supercar and a pre-series type 754 T7  - leading to the final '50 years of the porsche 911 exhibition which will be hosted from june 4th until september 29th 2013.

When the '911’ was officially launched to the market in 1964, it boasted an air-cooled, six-cylinder boxer engine that developed 128 hp capable of reaching a top speed of 131 mph (211 km/h). (via)