When it comes to special one-off Aston Martins->ke13, the British automaker usually taps the service of one design house: Zagato.

We've seen over the years what a collaboration between the two companies can produce. Now that Aston Martin is in the middle of celebrating its 100th anniversary, it's not surprising that Zagato has come back to build a pair of special one-off models to commemorate the occasion.

One of these models is called the DB9->ke210 Spyder Zagato Centennial, a special model based on the 2013 DB9 Volante convertible. Looking completely different from what we've come to know about the modern DB9 Volante, the DB9 Spyder Zagato Centennial does carry plenty of design inspiration, most notably from the 1994-2003 DB7 Zagato.

Equally fascinating is the way Aston Martin and Zagato went to giving the one-off model unique tastes of both companies. From Zagato's double-bubble roof to Aston Martin's unmistakable, albeit larger, grille and fender vents, the DB9 Spyder Zagato Centennial really does represent the best of both worlds.

One thing that did throw us for a little loop is the design of the round headlights, which does harken us back to the V8 Zagato of the 80's but comes as a little out of place when built into the sharper and more streamlined look of the current DB9 Volante.

In any case, the DB9 Spyder Zagato Centennial is still a treat to look at and noted American collector and Aston Martin enthusiast Peter Read is a pretty lucky man to being the recipient of this one-off ride.

Click past the jump to read about the Aston Martin DB9 Volante

Aston Martin DB9 Volante

Aston Martin knows all too well the value of its vehicles. In the case of the successful DB9, that entails continuing its life and giving it a little nip here and a little tuck there. The result is a convertible that still features the unmistakable class of an Aston Martin->ke13 mixed in with hints of sporty aggressiveness.

The car's performance does get is own changes, highlighted by the use of a new all-alloy 6.0-liter V-12 engine that produces a tidy 510 horsepower and 457 pound-feet of torque, good enough to give the supercar->ke177 a 0-to-60 mph time of 4.6 seconds with a top speed of 183 mph.