If there would be a proofed chain of ownership this would be vital for the proof of authenticity
The Tzar family used those spoons in Winter Palace,and when the Palace was stormed, one of the Bolsheviks nicked them off the dining table and the lot finally ended up in Bulgaria.
The SAME seller has obviously well established chain of ownership with imperial courts, offering currently:
1.Louis XIV pocket watches (one sold,one in stock)
2.Presentation watch;case decorated with portraits of Wilhelm II, German Emperor and Franz Joseph I of Austria
3.Faberge award Alexander III Cypher pin brooch
4.Ottoman Empire Sultan watch
The cherry on the cake:
ONE OF A KIND gold enamel watch for Catherine II The Great
But the seller wants to be progressive.Therefore he offers XVIII century French revolutionary watch owned by Robespierre and even Mao Zedong (their portraits in enamel).
Regards