We've learned everything Ford would tell us about the 2015 Mustang 50 Year Limited Edition at the New York Auto Show->ke226 last month, when the iconic pony turned half a century, but what Ford->ke31 failed to mention is that this special muscle car will also get a convertible version.

Unfortunately, the drop-top pony isn't intended to hit dealerships along with other 2015 Mustangs. The 50 Year Limited Edition-based cabriolet->ke144 will only be built as a one-off, with its lucky owner to be decided through a charitable raffle.

Finished in Wimbledon White and fitted with all the amenities found on the 50th Anniversary Mustang, this unique ride will be equipped with a special instrument panel badge with serial number 0001 of 0001 and signed by company Executive Chairman Bill Ford. Just like the 50 Year Limited Edition, the convertible will be built in GT guise, with the iconic 5.0-liter, V-8 Coyote engine under the hood.

The muscle car->ke507 will be donated to the National Multiple Sclerosis Society, who is raffling it to raise funds for its "No Opportunity Wasted" MS research initiative. The raffle tickets can be purchased in "limited numbers" through both the National MS Society and Ford, as well as on Ford4MS.com, for $20 each. The Society is hoping to raise $2 million for the unique Mustang, which shouldn't be too hard. To achieve this goal, Ford and the National MS Society need to sell 100,000 tickets.

The winning raffle ticket will be drawn during the Woodward Dream Cruise on August 16.

Click past the jump to read more about the 2015 Ford Mustang 50 Year Limited Edition.

Why It Matters

Although it isn't the first unique Ford Mustang->ke428 created for such purposes, the 50 Years Convertible is the first one-of-a-kind 2015 'Stang to roll out of Dearborn. Many are likely to follow, but there will be only one anniversary drop-top roaming the streets.

2015 Ford Mustang 50 Year Limited Edition

Unveiled at the 2014 New York Auto Show->ke226, the 2015 Mustang 50 Year Limited Edition was created to mark the pony car's 50th anniversary. Only 1,964 units will be built - a reference to the vehicle's first year on the market – with all of them to be sold as GT models.

Fitted with several unique features inside and out, the 50 Year Mustang will be retailed in two exclusive colors, Wimbledon White (just like the first 1964 Mustang) and Kona Blue. Power will be provided by a 5.0-liter V-8 engine set to generate more than 420 horsepower and 390 pound-feet of torque.