One of the items currently available from the Blackman Cruz collection is this amazing Italian wooden space helmet prop from the 1930's .
Presumably they've had it authenticated, but I'm having a hard time imagining the circumstances of it's creation. Was it a background prop? A design study? The best theory I can come up with is that it was a master for a mold of some kind, hence the split down the middle. If it is authentic it bears an amazing resemblance to some of the pre-production designs Ralph McQuarrie did for "Star Wars".
Whatever it's origin I'd love to have it for my own, though I suspect the price is a bit out of my reach.