A Russian silver, gold plated and enamelled letter opener, by Pavel Ovchinnikov, Moscow, circa 1890, the square form handle inset with blue guilloche enamel panel mounted with small rose cut diamonds and ruby cabochon, terminating in a nephrite jade cabochon finial. Struck to blade with maker's mark, assay mark for Anatoly Apollonovich Artsybashev, dated 1890, town mark for Moscow, 84 mark and Imperial warrant granted by Tsar Alexander III. 18.5 cm long, the blade 2 cm wide