This is not my area of collecting, therefore my resources are limited regarding this sword. The closest I can find is in Harvey Withers'
World Swords, and he calls this sword an Austro-Hungarian Model 1850/1871 Naval Officer's Sword. If you register at
www.oldswords.com (it's free), you can search their database for Austrian Navy swords and get some images of similar swords. I can't find any info on the origin of this pattern, but that's not to say it isn't out there--I just don't know where it is. You could try posting this sword on the Antique & Military subforum at
www.swordforum.com . There are several people who frequent that forum who are more familiar with Continental military swords.
Good luck!
Jonathan
Added: If you need help posting images, feel free to PM me.