No doubt whatsoever. This one is Dutch. The site has several swords and their pics, I compared them to mine and all the details are there. They state the sword is based on the Russian M1826.
Also found a pic on Wither's book of a russian tsarist Infantry M1855 sword, very, very similar to this one, albeit the pommel was flat.
I'll contact the guy nonetheless.
BTW: Just changed the name of my image folder in Photobucket, so the first images may not load. The new address is