Following its reveal last June at the Goodwood Festival of Speed, it looks like the supposedly one-off Aston Martin Vantage GT12 will be followed by a top-down cabriolet version. The Vantage GT12 was built by “Q by Aston Martin”; Supposedly specializing in bespoke vehicles for the most discerning of clients, the division have completed and subsequently delivered the GT12 for a rather wealthy client.

The Aston Martin Vantage GT12 cabrio in action

Given the supposed uniqueness of the car, our spies guess that the GT12 Roadster they’ve found testing out around the roads of the Nürburgring Nordschliefe could either be a limited-run convertible version of the GT12 or a mere mule for a future model.

Rear quarter of the one-off Vantage

From the sound of it, the Vantage GT12 Roadster that was spotted testing at the Ring also runs the same 6.0L V12 motor and 7-speed automatic gearbox as the one-off GT12. Due to the roadster’s inherent structural deficiency, expect alterations to the suspension to compensate for the chassis’ decreased rigidity.

Side profile of the one-off Aston Martin cabrio

Only time will tell whether this GT12 Roadster is in fact a limited-run model or simply just a mule for another upcoming model.