8-9 years old and dusty. That’s a robot head not a helmet. It’s a small plastic jar that had a threaded cap. It lights up and you can see the wires inside the goggles. Some fun with the I phone 12 camera settings.
I went ahead and bought one of these helmets from Taobao through an agent. I guess there is no other way to obtain one of these otherwise.
Here the contact information of the seller.
To have a better idea about the dimensions, colour ect. some reference shots with a DAM Altyn...