Nice space helmet as long as you just sitting around.
Space hatches open inward (toward the pressurized area) for a reason. The internal pressure pushes the door onto the bulkhead seals. The pressure helps keep it sealed.
These space helmets are not safe. The internal pressure of the suit is pushing the visor away from the seals. The face shield is held in place by a pivot. There appears to be a circular ring or bladder which expands and seals against the inside of the visor when it is lowered. The visor should be on the inside of the helmet pushing against seals on the inside of the helmet frame. An internal visor design also shields these sealing edges from external impacts.
If the visor pivot or the helmet seal edges are damaged you are going bug eyed in a few minutes.
As long as you are sitting still in a cabin the risk is low, if you are doing anything where something might strike the helmet you do not want this helmet.
A solid fish bowl with a metallic collar is the best kind of helmet since the neck seals are usually metal on metal and quite robust. You can hit the fish bowl with a hammer (don’t go nuts) and it can hold up.