Thank you everyone for your comments. 
To complete this helmet again, I’m looking for one star screw. If someone has one left, please let me know. 1.4 x 1.4 cm (l/w). I found the counterpart plate inside the helmet, so I just need the screw
Regards,
Roland

To complete this helmet again, I’m looking for one star screw. If someone has one left, please let me know. 1.4 x 1.4 cm (l/w). I found the counterpart plate inside the helmet, so I just need the screw

Regards,
Roland