Violoncello, model "Marquis de Corberon"
This model is cut out from red willow tree and it's believed to be one of the best sounding Stradivari instruments.
The ‘Marquis de Corberon’ was lifelong possession of  Zara Nelsova, currently belongs to The Royal Academy of Music in London.
Watch video of Cello Concerto in D minor by Stefan Popov

Violin, model "Guarneri"

Violin, model "Stradivari"

Viola, model "Kaloferov"

Violoncello, model "Stradivari-Piatti"