Do you ever have an old project that you kind of started, but it got put to the sides for a while until it was forgotten? For some, it's renovating the bathroom. For others, it's a creative work, an unfinished novel. For Gio Ponti, its a car design.

The Italian industrial designer is releasing his never-seen Linea Diamante, or Diamond Line, a vehicle design he put together 65 years ago. Now the design is set to be revealed for the first time next month in Basel, Switzerland.

The Diamond Line was first conceived in 1953 as a response to the trend of small windows and dark cabins. Ponti strived for a vehicle with large window space to allow for plenty of natural light. The angular design would facilitate this, of course, while also earning its namesake.

Originally, the Diamond Line was to be built from a Romeo 1900 sedan. Ponti instead went to Fiat for production. The automaker would make a number of their own changes to what they considered a radical design, to the point that it was an entirely new vehicle. Those with a semblance to Ponti's vision wouldn't reach production until the 70s.

The fruition of Ponti's original design will debut at the Grand Basel show, in an event called The Automobile by Ponti Project on September 6. FCA Heritage Head Roberto Giolito will lead the event.