Two gem set and diamond presentation tie pins, early 20th century

From the Collection of Boris III, Tsar of Bulgaria (1894-1943)

Two gem set and diamond presentation tie pins, early 20th century

Comprising: a tie pin designed as the white enamelled cipher of Tsar Boris III of Bulgaria within a heart-shaped border of calibré-cut rubies, enhanced with rose diamonds, fitted case; and a tie pin designed as the cipher of Princess Marie Louise of Bourbon-Parma, Princess Consort of Bulgaria set with rose diamonds, circular rubies and emeralds, Austrian maker's and assay marks for gold, fitted case.