Help to establish the authorship!
 

Dear experts ( to let you go so ) ! Please help us to identify the author of this piece ! We only know that the watercolor paper was imported from Germany. Perhaps it was written by a French or German master the mid 19th century. At the bottom there is a stamp of the Royal Prussian Academy of the Arts (as I understand) and the inscription in red pencil . But the authorship Demuretta doubt .
Stamp : "KGL. Kunst-Akademie
            Borgerloh'sche Stiftung
            In Königsberg PR. "

Thank you in advance for your help!

for me, the remake.

For me, not a remake, the first half of the 20th century

the existence of the organization or the collection , Borgerloh'sche Stiftung der Kgl. Kunst-Akademie, never registered.
Google proof. There is the most complete collection of stamps in the world of art , Les marques de collections de dessins & d'estampes, collected Frits Lugt.
They collected stamps of various collections in the world of art. There are no print of this .
Weakly imagine collector who puts a stamp on the front side of the work , but still almost on the initials of the artist.
Perceive the story as a caricature , but to me it is not clear from what times and places have been collected attributes such as clothing soldier , his weapons and a silhouette of a warship in the background.
And so, in general , «Tout va très bien, Madame la Marquise»

Fantasy, as the saying goes : " English uniform , epaulettes Russian , Japanese tobacco , the governor of Omsk ".
I do not know about tobacco and rifle reminded the Japanese Arisaka Type 38 or the German Mauser Gewehr 98.
Cap is a fighter like Northerners during the Civil War.

and the calf he, like a camel's hoof))

On his legs socks or leggings /gamache.

This work is not new, it really was brought from Germany.

Added after 4 minutes
According to my research work is in the collection of Koenigsberg Academy of Arts , so as the Internet you can find works from the same stamp . As Google says, Konigsberg Academy of Arts (German Kunstakademie Königsberg) - an educational institution in Königsberg (now - Kaliningrad) that existed prior to January 1945 .

In the background is not a timber ship.

Soldier - amerikosy, the Civil War.

The work of the late XIX early XX century.

The proportions of deliberately not complied with.

Dear friends , I express my gratitude to all for the quick response! Your opinion is important to me.

[color="#666686 " ]Added after 8 minutes[/color]
Dear Boris , you are right ! Praportsii deliberately not sablyudeny . I also like the image of the soldier war a war of late XIX - early XX century. Perhaps the artist is not randomly chosen this theme. And in the background , I think, all the same ship.
But I'm more concerned about whether you can establish the authorship of this work?
I read about the Academy , about the fate of her collection. And I have the assumption that the work is written or the apprentice academy, or is it acquired for its collection. Therefore agree with sergejnowo, not everyone could afford to put a stamp on the product .