They french started to use them in 1816 as I understand it.
Then a number of the German states copied it in different variants in the 1840ties
This is one of thousands is one of 20.000+ produced for the Sleswig-Holstein rebels in 1848.
Note that it is single edged.
After the war ended in 1851 they where all stored in the main fortress in Holstein, but the Danish army logically decided to move them to Copenhagen.
In 1853 the army did complete inventory of all bladed weapons and sort of started from scratch.
The about 20.000 with leather scabbards where refurbished and then Issued to the 22 infantry battalions in the army.
This was done in 1854 so its called a "Sidearm model 1854"
The older infantry sabers that had been used where designated to the reserves.
This change makes sense. The sidearm was by the 1850ties expressly issued as a tool, not a weapon, and this weapon is a much better tool than a actual infantry saber.
for use cutting your way true thick hedges, for wood for fires, for roofs of huts, and for making fascines for field fortifications.
In the US we know it as the 1832 heavy artillery sword.
And similar it is more a tool that can be used for personal defense if needed, than a weapon that can be used as a tool.