The Duke of Chablais, facing right in gold-bordered blue coat with gold embroidered orange collar and cuffs, long gold epaulette, gold-figured waistcoat and orange trousers, white lace jabot and black stock, powdered hair en queue with black wig-bag, wearing the jewel of the Sardinian Order of the Most Sacred Annunciation; standing before a green-upholstered chair on a balcony, his left hand clasping a gold-embroidered black hat and his right hand pointing to the landscape; purple curtain and blue sky background

An old insription on the backing paper reads 'Le duc de Chablais, frère de Victor-amédée [.] [r]oi de Sardaigne. peint par Trossarelli. [.] porte L'ordre de L'annonc[.].'
Benedetto Maria Maurizio of Savoy, Duke of Chablais (1741-1808), was the half-brother of King Victor Amadeus III of Sardinia. In 1775, Benedetto married his half-niece, the King's third daughter Princess Maria Anna of Savoy.
Another portrait of the Duke was illustrated on the front cover page of the sale of the Portrait Miniatures from the Estate of King Umberto II of Italy, Sotheby's, Geneva, 12 November 1984, lot 27. Another miniature, featuring the Duke with his wife, is illustrated in the exhibition catalogue Miniature Sabaude, Turin, 1996, p. 22-23, no. 2.