The pictures are from the Army Museum in Stockholm, and according to them it's an m/1775-1807 for troopers at Savolax' light infantry regiment. It's a "modification model", where the inner guards on the old m/1775 sabers were ground off to reduce wear&tear on the uniforms. The m/1775 in turn seems to be identical to the m/1770 for Savolax' jaegers on foot.
You can get a better look at an m/1770 or m/1775 here:
http://www.auktionsverket.se/dbkatal...007-12-10&anr=