We found that trunk in Berlin…

Under its layer of dust, nobody had noticed the monogram on both sides; we ourselves thought we had bought a mere large-sized leather steamer trunk. That was already a very good thing.

When the trunk was delivered by the trucker, while unpacking we had glimpsed the logo.

After restoring, we did some research to try to know who the previous owner was.

It was the Grand Duke Kirill of Russia.

To sum up:
Cyrille Vladimirovitch of Russia (in Russian : Кирилл Владимирович Романов, born 12 October 1876 in Tsarskoïe Selo, died 12 October 1938 in Neuilly-sur-Seine

Was Grand Duke of Russia

Member of the house of Holstein-Gottorp-Romanov

Rear-Admiral in the Imperial Navy of Russia

Head of the Imperial Family of Russia from 1924 to 1938 (pretender to the throne)

You will find full “Wikipedia” information on that character here : ici