WWI Prussian Leather Officer's Pickelhaube with original leather liner circa 1860s

This Pickehaube is in great condition.  The leather on the visor has bubbled a little but remains sturdy.  The full leather liner is intact, and the brasses have been polished.  The leather chin strap is folded in front of the visor for a splendid detail to this very ornate officer's helmet. The Pickelhaube was originally designed in 1842 by King Frederick William IV of Prussia.  The basic Pickelhaube was made of hardened (boiled) leather, given a glossy-black finish, and reinforced with metal trim (usually plated with gold or silver for officers) that included a metal spike at the crown.   In 1867, Prussia attempted to reduce the weight of the helmet by removing the metal binding of the front peak, and the metal reinforcing band on the rear of the crown (which also concealed the stitched rear seam of the leather crown).  Since this one has the back band, it is assumed to be circa pre-1867.