I have found 3 prints, one is by Knotel, simply titled Hollande: Cuirassier 1810. This image depicts a mounted trooper with cuirass and brass helmet. The image by the Suhr brothers in this website shows a dismounted trooper with no cuirass and steel helmet with brass comb, ostensibly from The 1807 periodThe last image is by Worgler Hansen, and it depicts a trooper from 1809 with the same steel and brass helmet. I'm looking for any proof for either style.