They used to have a steady supply of those on ebay all the time and suddenly stopped..I wonder why. I few year ago, I had a portomac and it broke down into the 4 parts...the interior wasn't as detailed as the one above,but it was nice. IT wasn't eaer able. If yhou put it on, you can't keep the pressure from your head from separateing the facemask and jaw,but was a beautiful display piece...wish I handn't sold it.
This one has little hinges that flip up (hidden when flipped down) from the back of the jaw piece that secure the facemask tightly. The interior eye piece is detachable so you can see out the lenses, and it comes with removable straps for wearing it.
I don't really want to sell mine, but anything is for sale for the right price...