Two gem set and diamond presentation tie pins, early 20th century, Vienna 1900: An Imperial and Royal Collection, 2023

Emerald and diamond tie pin, circa 1910

Exceptional' Collection of Royal Jewels Coming to Auction This

Tsar Van Cleef Arpels

Pearl and diamond tie pin, circa 1900

Diamond brooch, circa 1936 and a diamond tie pin

Sotheby's Vienna 1900: An Imperial and Royal Collection

Vienna 1900: An Imperial and Royal Collection' auction triples

Sotheby's Vienna 1900: An Imperial and Royal Collection

Jewellery, Watches and Objects of Vertu (12 Sep 23) by Noonans

Collection of gem set cufflinks, early 20th century

Collection of gem set cufflinks, early 20th century