Authenticity guaranteed.
Very fine antique russian silver tall goblet - cup. 
Unusual engraved decoration.
Marked on the side and under the base with set of russian silver hallmarks for moscow 1878 , 84 and maker's mark in cyrillic. 
Monogrammed on front.
    Size: 
About 3 15/16 in. (10 cm) high.
   Weight: 
About 1.9 troy oz. - 60 grams. 
   Condition:
Very good original antique condition with light age wear, minor expected dents and scratches. 
No repairs.
Rare and fine example of antique russian silver.