I decided to publish this project as this model is of high quality and ready for 3D print. My client wanted Nasa Space Helmet presented on the copy of famous Venus De Milo sculpture. 
My role was to model a helmet which will be executed technically correct (All slider systems working and consist of proper geometry) and can be produced in a real life (3D printed in our case). I've added Venus De Milo model in my renders for presentation purposes.
No photos used in this project. 
Helmet model close ups:
Wireframes & Viewports:
Thank you for watching!