#159 18th-C Athena “Sulphide”

Rare 18th century “sulphide” reverse intaglio with lavender background, mounted on copper, depicting Minerva with shield bearing the portrait of British statesman William Pitt the Younger (1758-1810), who served as prime minister during England’s war with France. This button (with varied border) is shown BBB PL 70, #15, along with a detailed explanation of the intaglio process. Heavy copper loop shank. Est. selling price is $600-1500.