'Rediscovered' Degas goes on show in London

Is this the original version of Edgar Degass Little Dancer Aged Fourteen exhibited at the sixth Impressionist show in Paris in 1881? The London dealer Guy Stair Sainty is convinced that it is and says that a growing number of scholars are coming around to the idea. He is staging a special exhibition around the work in his Mayfair gallery (until 26 May).
The bronze was made from a plaster cast found in the mid-1990s in the Valsuani foundry, the Paris workshop that produced bronzes of Degass scul