In the past year, Porsche celebrated its 70th anniversary. For the anniversary, the company decided not only to remind about its most famous models but also to showcase rare Porsches that few people know about. 
In the short video, you can see the most unusual Porsche convertibles. In particular, the already forgotten concept car Porsche Panamericana from 1989 with a 250-horsepower engine was gifted to Ferdinand Porsche Jr. 
Few remember the single-seat Porsche 911 Speedster from 1987.
And the Porsche 984 could very well have become the serial predecessor to the Boxster. The roadster weighs only 880 kg, and therefore a 135-horsepower engine is enough to reach 220 km/h. 
The Porsche Cayenne Convertible, of course, was never intended for production, although the car looks very stylish and original. 
Finally, the last one is the Porsche 918 Spyder prototype, released in 2012. It was used to test the hybrid setup.