A GREEK GLASS RINGSTONE WITH A PORTRAIT BUST OF PRUSIAS...

A GREEK GLASS RINGSTONE WITH A PORTRAIT BUST OF PRUSIAS I OF BITHYNIA
HELLENISTIC PERIOD, CIRCA LATE 3RD-EARLY 2ND CENTURY B.C.
½ in. (1.1 cm.) long; ring size 8 ½

Provenance
Paul (Paulus) von Praun (1548-1616), Nuremberg and Bologna; thence by continuous descent within his family.
Sibylle Mertens-Schaaffhausen (1797-1857), Cologne and Rome, acquired from the above, 1839; thence by descent.
Catalogue des collections laissées par feu Madame Mertens Schaaffhausen, seconde partie, J.M. Heberle (H. Lempertz), Cologne, 12 July 1859 (and following days), lot 1077.
M.H. Nevil Story-Maskelyne (1823-1911), Wroughton, Wiltshire, acquired 1860-1899; thence by descent to his son-in-law, William Arnold-Forster (1886-1951), Cornwall.
Catalogue of the Story-Maskelyne Collection of Ancient Gems, the Property of W.E. Arnold Forster, Esq., Sotheby's, London, 4-5 July 1921, lot 213 (part).
Landsberg, acquired from the above (according to auctioneer’s book).
Marjorie Bronfman (1917-2012), Montreal, acquired by 1978; gifted to her daughter, Dr. Corinne Bronfman (1947-2022), Washington, D.C.; thence by descent to the current owner.