This link you have is for the model from 1845. Both raupenhelm models differ in the way the lions are attached.In the model from 1845, the lions are mounted with a single screw, which is attached to an appropriate oarlock.In the 1868 model, the lion is mounted with wires or screws with nuts.
It was a good purchase. I rebuilt the raupenhelm a few years agoI'll help you find parts.https://www.pickelhaubes.com/xf/threads/raupenhelm-m1845.15137/
Unfortunately, to buy cheaply you have to browse websites with offers several times a day.I cleaned the wappen that didn't fit and sold it in Poland for 300 euros. So the total cost of the item was around 200 euros.
Overall, the item looks original, but the hole between the wappen is disturbing.Remove the wappen and take a photo. Maybe it's a conversion from a different position?