"The 'Hellier' and the instrument known as the Spanish Stradivari, dated 1679 and 1687 respectively, have backs of broad curl in one piece; the latter is exceptionally handsome, and both are of wood of foreign (i.e. non-Italian, growth)." (p. 43)
Antonio Stradivarius: His Life & Work, W. Henry, Arthur F. & Alfred E. Hill, W. Henry, Arthur F. & Alfred E. Hill, William E. Hill & Sons, London, 1902
According to Doring, this instrument is misnamed because it was not one of the ones made for the Spanish court. The name was given by Ole Bull, who mistakenly took it for one of the Spanish quintet.
How Many Strads?, Ernest N. Doring, Ernest N. Doring, William Lewis & Son, Chicago, 1945