Hi Mervyn,
I took the photo's from a Police Memrabilia collectors site where it was described as a Senior Officers helmet. There are no shots of the inside of the helmet.
Looking at the description again it mentions the fittings being of white metal, a Senior Officers would have been silver wouldn't they?
The style of helmet itself was never worn as an "everyday" helmet by Newastle Police. They originally wore the "Rose" top helmet & then changed to the "Ball" top.
It is possible that the ceremonial helmet was produced for special occasions for use by Constables & Sergeants.
I've attached photo's of the Victorian "Rose" top & later "Ball" top wich is shown with the black night fittings.