The Big Book of Buttons has this to say about this very interesting button:
"Napoleon's military expedition to Egypt in 1798-99 renewed a popular interest in Egyptian antiquities and art. These decorative motifs appeared on furniture, jewelry and accessories from 1830's to 1890's".
This button is an image of Cleopatra.
"A handsome design with fine detail, of one piece stamped brass with an applied rim of facetted steels".
In 2011, this button was valued at $40.00. I am selling it for that price, even tho the value of buttons goes up every year.
7/8" in diameter.