Rare Antique WW1 Prussian German Pickelhaube Leather Spiked Helmet

Description

Straight from the estate of a well-known military antique collector which includes over 30 helmets and pickelhaubes from pre-WW1 and WW2 era that will be listed on my page in the near future
(pictures available upon request)
.  None of these helmets have been professionally authenticated that I'm aware of and I am NOT an expert myself.  Anything mentioned herein is simply my uneducated opinion.  That said, all helmet sales are final and returns will not be accepted.  Please take that into consideration and please ask any and all questions you may have before bidding.
This particular helmet is in good shape overall with no major signs of trauma or visible damage.  It appears to be structurally sound and straight with the exception of the back bill which is being held on by a few original stitches on one side and the rear post.  The outer leather is super smooth and shows only very light signs of crazing.  The inner leather chin strap is still intact and in good condition with signs of aging.  The outer metal chin strap is being held together with a small wire and would likely need a link replaced to lock together without it, but it's not very noticeable.  Badge and other metal parts show no obvious signs of damage.  The inner liner is degraded and in poor condition as seen in the last picture.
No identifiable markings on the inside of the helmet.
As previously stated, I am NOT an expert on these helmets but I have done my best to detail this item and point out any noticeable
discrepancies that may concern you as a buyer.  If I missed any important details or you want me to check something in particular, please ask before bidding.
This does not appear to be a reproduction but its authenticity cannot be guaranteed.  Stand seen in pictures not included.