"Old Lobmeyr Glass Enameled With Princely Alliance Coat Of Arms"
Beautiful glass on a foot decorated with enamel painted with the coats of arms of two Russian princely families: the Voronstovs and the Troubetskoys, an alliance during which the glassware service was born, of which this glass is part (and the other 8 that I have) must be this one of the general prince Semyon Mikhailovich Vorontsov (1823-1882) with Maria Vasilyevna Stolypina, born princess Trubetskaya (1819-1895).
Along the upper edge, the motto: SEMPER IMMOTA FIDES IN DEO SPES MEA.
Of this glass service we have 8 other glasses identical to this one put up for sale here and 5 liqueur glasses.
More details in photos are visible by connecting to: https://www.dropbox.com/scl/fo/7rg9qctmyo2lgsebfynaj/AMdjWfKIJX2GWmGqphFkZnY?rlkey=s4pluw7hu9b1wy0icnbu7iuhl&st=df9bpeup&dl=0