I'll give it a go....errr.....it looks reasonable to me depending on the price I suppose. I think these should be 'blued' steel and the surface seems to have lost it's "blueing" or is it the tint of the photo's? If it has lost it's original suface I'd guess that's a fairly big negative aspect but that's just me!
I'm not sure if the spike's original, mine has the standard size spike but I think these should have a slightly longer type with a slightly different profile contour. Maybe they weren't too fussy late on, I don't know?
The chinstrap looks new to me. Cockade's look pretty OK but it would be good to see this whole thing in close-up really. Liner looks in reasonable shape....have the spike-base fixing brads been touched do you think - I can't recall seeing these to fix a base on a metallhelm but I'm sure someone will put me straight on this!
You really need some of the more experienced guy's on here to chime in on this but that's my 2cent's for what it's worth.......good luck with it anyway.
How much is it? I think it's quite a nice example overall;o)