Biaggi bought The 1199 Senna | Ducati news | Scoop.it
The reason which for i used 'the' is because this is the only Ducati 1199 Senna sold in Europe.

The last 1199 Panigale S "Senna" to be sold, was part of an charity auction and even if all the "Senna" models were to be sold in Ayron's home country, the last one of these was sent to Sotheby's, the famous auctioner from U.K.