Marked on the rim of the square base.
Makers mark: Schwarz & Steiner, Wien, ca.1880-1895.
Gold and jewelry maker since 1872 in the Karnthnerstrasse in Vienna.
Silver : 800/1000.
Literature:
Waltraud Neuwirt “Wiener Gold -und Silberschnmiede und ihre Punzen, 1867-1922, Vol. II, Page 202.
Austria – Vienna
About 1880 - 1900