I put this bust together using the exact same costume components as were used for the movie costume.
Gas mask is a Russian GP-7V gas mask which has been modified (as in the movie) by moving some components around, adding hose (from a seperate gas mask) and tinting the lenses to make them darker.
The miner's hard hat is an MSA Comfo Cap. Rather than spend big bucks on a vintage black one, I bought a new white one and sprayed it black.
The lamp is a Koehler Wheat light - the proper vintage type. I was very lucky to pick this up.
Oh, and that's a real pig's heart that the set-up is displayed with - it was preserved for medical education.