Using the book, “Faschinenmesser” by Wolfgang Peter Michel, as a reference, it would appear that this is a model 1849 Preussisches Artillerie-Faschinenmesser. If you look on the spine of the blade toward the hilt you should find something like a crown over W over a two digit number. That indicates its acceptance into the Prussian army. The two digits would be the last two digits of the year. Apparently it got some use. The 30.R.1 indicates which Prussian unit it belonged to. Perhaps 30th infantry regiment first company. I am not well-versed in this type of sword.